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CVE-2026-6766

Incorrect boundary conditions in the Libraries component in NSS

7.5 HighFix available

Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
None
Availability
None

Exploit likelihood

0.26%Up 0.2 points since Apr 22, 2026
90%50%10%1%

What each source reports

CVE List Score used 7.5

Incorrect boundary conditions in the Libraries component in NSS

Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

Record
CVE-2026-6766
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-754
Updated
2026-11-02
EUVDEUVD-2026-24107 7.5

Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

Record
EUVD-2026-24107
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-q6qg-6fmg-jjcv 7.5

Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in...

Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.

Record
GHSA-q6qg-6fmg-jjcv
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-754
Updated
2026-11-02
NVD 7.5

Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

Record
CVE-2026-6766
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-754
Updated
2026-11-02
OSVDEBIAN-CVE-2026-6766 7.5

Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

Record
DEBIAN-CVE-2026-6766
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSVOESA-2026-2105 9.8

firefox security update

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance and portability. %if 0 %global moz_debug_prefix /lib/debug %global moz_debug_dir /lib/debug/ %global uname_m %(uname -m) %global symbols_file_name -.en-US.-%(uname.crashreporter-symbols.zip %global symbols_file_path /lib/debug//-.en-US.-%(uname.crashreporter-symbols.zip %global _find_debuginfo_opts -p /lib/debug//-.en-US.-%(uname.crashreporter-symbols.zip -o debugcrashreporter.list %global crashreporter_pkg_name mozilla-crashreporter--debuginfo

Security Fix(es):

Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.(CVE-2026-6746)

Use-after-free vulnerability in the WebRTC component of Firefox. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6747)

Uninitialized memory in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6748)

Information disclosure due to uninitialized memory in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.(CVE-2026-6749)

Privilege escalation vulnerability in the WebRender graphics component of Firefox browser. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.(CVE-2026-6750)

An uninitialized memory vulnerability exists in the Audio/Video: Web Codecs component of Firefox browser. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6751)

Incorrect boundary conditions in the WebRTC component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.(CVE-2026-6752)

Incorrect boundary conditions in the WebRTC component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.(CVE-2026-6753)

A use-after-free vulnerability exists in the JavaScript Engine component of Mozilla Firefox. An attacker could potentially exploit this vulnerability to execute arbitrary code or cause the application to crash. This vulnerability has been fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.(CVE-2026-6754)

Invalid pointer in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.(CVE-2026-6757)

Use-after-free in the Widget: Cocoa component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6759)

Privilege escalation in the Networking component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6761)

Spoofing issue in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.(CVE-2026-6762)

Mitigation bypass in the File Handling component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6763)

Incorrect boundary conditions in the DOM: Device Interfaces component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6764)

Information disclosure in the Form Autofill component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6765)

Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6766)

Other issue in the Libraries component in NSS. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.(CVE-2026-6767)

Privilege escalation in the Debugger component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6769)

Other issue in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6770)

Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 150 and Firefox…

Record
OESA-2026-2105
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
Show 48 moreShow less
OSVOESA-2026-2106 9.8

firefox security update

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance and portability. %if 0 %global moz_debug_prefix /lib/debug %global moz_debug_dir /lib/debug/ %global uname_m %(uname -m) %global symbols_file_name -.en-US.-%(uname.crashreporter-symbols.zip %global symbols_file_path /lib/debug//-.en-US.-%(uname.crashreporter-symbols.zip %global _find_debuginfo_opts -p /lib/debug//-.en-US.-%(uname.crashreporter-symbols.zip -o debugcrashreporter.list %global crashreporter_pkg_name mozilla-crashreporter--debuginfo

Security Fix(es):

Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.(CVE-2026-6746)

Use-after-free vulnerability in the WebRTC component of Firefox. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6747)

Uninitialized memory in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6748)

Information disclosure due to uninitialized memory in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.(CVE-2026-6749)

Privilege escalation vulnerability in the WebRender graphics component of Firefox browser. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.(CVE-2026-6750)

An uninitialized memory vulnerability exists in the Audio/Video: Web Codecs component of Firefox browser. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6751)

Incorrect boundary conditions in the WebRTC component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.(CVE-2026-6752)

Incorrect boundary conditions in the WebRTC component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.(CVE-2026-6753)

A use-after-free vulnerability exists in the JavaScript Engine component of Mozilla Firefox. An attacker could potentially exploit this vulnerability to execute arbitrary code or cause the application to crash. This vulnerability has been fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.(CVE-2026-6754)

Invalid pointer in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.(CVE-2026-6757)

Use-after-free in the Widget: Cocoa component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6759)

Privilege escalation in the Networking component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6761)

Spoofing issue in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.(CVE-2026-6762)

Mitigation bypass in the File Handling component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6763)

Incorrect boundary conditions in the DOM: Device Interfaces component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6764)

Information disclosure in the Form Autofill component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6765)

Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6766)

Other issue in the Libraries component in NSS. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.(CVE-2026-6767)

Privilege escalation in the Debugger component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6769)

Other issue in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6770)

Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 150 and Firefox…

Record
OESA-2026-2106
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVOESA-2026-2107 9.8

firefox security update

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance and portability. %if 0 %global moz_debug_prefix /lib/debug %global moz_debug_dir /lib/debug/ %global uname_m %(uname -m) %global symbols_file_name -.en-US.-%(uname.crashreporter-symbols.zip %global symbols_file_path /lib/debug//-.en-US.-%(uname.crashreporter-symbols.zip %global _find_debuginfo_opts -p /lib/debug//-.en-US.-%(uname.crashreporter-symbols.zip -o debugcrashreporter.list %global crashreporter_pkg_name mozilla-crashreporter--debuginfo

Security Fix(es):

Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.(CVE-2026-6746)

Use-after-free vulnerability in the WebRTC component of Firefox. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6747)

Uninitialized memory in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6748)

Information disclosure due to uninitialized memory in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.(CVE-2026-6749)

Privilege escalation vulnerability in the WebRender graphics component of Firefox browser. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.(CVE-2026-6750)

An uninitialized memory vulnerability exists in the Audio/Video: Web Codecs component of Firefox browser. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6751)

Incorrect boundary conditions in the WebRTC component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.(CVE-2026-6752)

Incorrect boundary conditions in the WebRTC component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.(CVE-2026-6753)

A use-after-free vulnerability exists in the JavaScript Engine component of Mozilla Firefox. An attacker could potentially exploit this vulnerability to execute arbitrary code or cause the application to crash. This vulnerability has been fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.(CVE-2026-6754)

Invalid pointer in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.(CVE-2026-6757)

Use-after-free in the Widget: Cocoa component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6759)

Privilege escalation in the Networking component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6761)

Spoofing issue in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.(CVE-2026-6762)

Mitigation bypass in the File Handling component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6763)

Incorrect boundary conditions in the DOM: Device Interfaces component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6764)

Information disclosure in the Form Autofill component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6765)

Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6766)

Other issue in the Libraries component in NSS. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.(CVE-2026-6767)

Privilege escalation in the Debugger component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6769)

Other issue in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6770)

Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 150 and Firefox…

Record
OESA-2026-2107
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVOESA-2026-2108 9.8

firefox security update

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance and portability. %if 0 %global moz_debug_prefix /lib/debug %global moz_debug_dir /lib/debug/ %global uname_m %(uname -m) %global symbols_file_name -.en-US.-%(uname.crashreporter-symbols.zip %global symbols_file_path /lib/debug//-.en-US.-%(uname.crashreporter-symbols.zip %global _find_debuginfo_opts -p /lib/debug//-.en-US.-%(uname.crashreporter-symbols.zip -o debugcrashreporter.list %global crashreporter_pkg_name mozilla-crashreporter--debuginfo

Security Fix(es):

Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.(CVE-2026-6746)

Use-after-free vulnerability in the WebRTC component of Firefox. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6747)

Uninitialized memory in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6748)

Information disclosure due to uninitialized memory in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.(CVE-2026-6749)

Privilege escalation vulnerability in the WebRender graphics component of Firefox browser. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.(CVE-2026-6750)

An uninitialized memory vulnerability exists in the Audio/Video: Web Codecs component of Firefox browser. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6751)

Incorrect boundary conditions in the WebRTC component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.(CVE-2026-6752)

Incorrect boundary conditions in the WebRTC component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.(CVE-2026-6753)

A use-after-free vulnerability exists in the JavaScript Engine component of Mozilla Firefox. An attacker could potentially exploit this vulnerability to execute arbitrary code or cause the application to crash. This vulnerability has been fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.(CVE-2026-6754)

Invalid pointer in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.(CVE-2026-6757)

Use-after-free in the Widget: Cocoa component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6759)

Privilege escalation in the Networking component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6761)

Spoofing issue in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.(CVE-2026-6762)

Mitigation bypass in the File Handling component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6763)

Incorrect boundary conditions in the DOM: Device Interfaces component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6764)

Information disclosure in the Form Autofill component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6765)

Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6766)

Other issue in the Libraries component in NSS. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.(CVE-2026-6767)

Privilege escalation in the Debugger component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6769)

Other issue in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6770)

Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 150 and Firefox…

Record
OESA-2026-2108
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVOESA-2026-2109 10.0

thunderbird security update

Mozilla Thunderbird is a standalone mail and newsgroup client.

Security Fix(es):

Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.(CVE-2026-2776)

Privilege escalation in the Netmonitor component. This vulnerability was fixed in Firefox 148, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.(CVE-2026-2780)

Memory safety bugs present in Firefox ESR 115.34.0, Firefox ESR 140.9.0, Thunderbird ESR 140.9.0, Firefox 149.0.1 and Thunderbird 149.0.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 149.0.2, Firefox ESR < 115.34.1, and Firefox ESR < 140.9.1.(CVE-2026-5731)

Incorrect boundary conditions, integer overflow in the Graphics: Text component. This vulnerability affects Firefox < 149.0.2 and Firefox ESR < 140.9.1.(CVE-2026-5732)

Memory safety bugs present in Firefox ESR 140.9.0, Thunderbird ESR 140.9.0, Firefox 149.0.1 and Thunderbird 149.0.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 149.0.2 and Firefox ESR < 140.9.1.(CVE-2026-5734)

Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.(CVE-2026-6746)

Use-after-free vulnerability in the WebRTC component of Firefox. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6747)

Uninitialized memory in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6748)

Information disclosure due to uninitialized memory in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.(CVE-2026-6749)

Privilege escalation vulnerability in the WebRender graphics component of Firefox browser. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.(CVE-2026-6750)

An uninitialized memory vulnerability exists in the Audio/Video: Web Codecs component of Firefox browser. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.(CVE-2026-6751)

Incorrect boundary conditions in the WebRTC component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.(CVE-2026-6752)

Incorrect boundary conditions in the WebRTC component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.(CVE-2026-6753)

A use-after-free vulnerability exists in the JavaScript Engine component of Mozilla Firefox. An attacker could potentially exploit this vulnerability to execute arbitrary code or cause the application to crash. This vulnerability has been fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.(CVE-2026-6754)

Invalid pointer in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.(CVE-2026-6757)

A use-after-free vulnerability exists in the Widget: Cocoa component of Mozilla Firefox and Thunderbird. The vulnerability stems from the program referencing memory after it has been freed. An attacker could exploit this vulnerability to cause the application to crash, read unexpected values, or execute arbitrary code, thereby affecting the confidentiality, integrity, and availability of the system. This vulnerability affects Firefox versions up to 149 and corresponding versions of Thunderbird.(CVE-2026-6759)

A privilege escalation vulnerability exists in the Networking component of Mozilla Firefox and Thunderbird. An attacker could potentially exploit this…

Record
OESA-2026-2109
CVSS 3.1
10.0 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2026:10757 7.5

Red Hat Security Advisory: firefox security update

Record
RHSA-2026:10757
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2026:10766 7.5

Red Hat Security Advisory: firefox security update

Record
RHSA-2026:10766
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2026:10767 7.5

Red Hat Security Advisory: firefox security update

Record
RHSA-2026:10767
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2026:12285 7.5

Red Hat Security Advisory: thunderbird security update

Record
RHSA-2026:12285
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2026:13537 7.5

Red Hat Security Advisory: thunderbird security update

Record
RHSA-2026:13537
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2026:15892 7.5

Red Hat Security Advisory: thunderbird security update

Record
RHSA-2026:15892
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2026:17477 7.5

Red Hat Security Advisory: firefox security update

Record
RHSA-2026:17477
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2026:17687 7.5

Red Hat Security Advisory: firefox security update

Record
RHSA-2026:17687
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2026:17688 7.5

Red Hat Security Advisory: firefox security update

Record
RHSA-2026:17688
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2026:17689 7.5

Red Hat Security Advisory: firefox security update

Record
RHSA-2026:17689
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2026:17690 7.5

Red Hat Security Advisory: firefox security update

Record
RHSA-2026:17690
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2026:19041 7.5

Red Hat Security Advisory: firefox security update

Record
RHSA-2026:19041
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2026:19131 7.5

Red Hat Security Advisory: thunderbird security update

Record
RHSA-2026:19131
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2026:19201 7.5

Red Hat Security Advisory: firefox security update

Record
RHSA-2026:19201
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2026:19348 8.8

Red Hat Security Advisory: thunderbird security update

Record
RHSA-2026:19348
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2026:19461 7.5

Red Hat Security Advisory: thunderbird security update

Record
RHSA-2026:19461
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2026:19462 7.5

Red Hat Security Advisory: thunderbird security update

Record
RHSA-2026:19462
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2026:19463 7.5

Red Hat Security Advisory: thunderbird security update

Record
RHSA-2026:19463
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2026:19464 7.5

Red Hat Security Advisory: firefox security update

Record
RHSA-2026:19464
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2026:19465 7.5

Red Hat Security Advisory: thunderbird security update

Record
RHSA-2026:19465
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2026:19466 7.5

Red Hat Security Advisory: thunderbird security update

Record
RHSA-2026:19466
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2026:19467 7.5

Red Hat Security Advisory: thunderbird security update

Record
RHSA-2026:19467
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2026:19468 7.5

Red Hat Security Advisory: thunderbird security update

Record
RHSA-2026:19468
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2026:19469 7.5

Red Hat Security Advisory: thunderbird security update

Record
RHSA-2026:19469
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2026:19542 7.5

Red Hat Security Advisory: firefox security update

Record
RHSA-2026:19542
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2026:19655 7.5

Red Hat Security Advisory: firefox security update

Record
RHSA-2026:19655
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2026:19704 7.5

Red Hat Security Advisory: firefox security update

Record
RHSA-2026:19704
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRLSA-2026:10757 7.5

Important: firefox security update

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.

Security Fix(es):

  • firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6772)

  • firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-6754)

  • firefox: thunderbird: Spoofing issue in the DOM: Core & HTML component (CVE-2026-6762)

  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6752)

  • firefox: thunderbird: Other issue in the Storage: IndexedDB component (CVE-2026-6770)

  • firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-6757)

  • firefox: thunderbird: Other issue in the Libraries component in NSS (CVE-2026-6767)

  • firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6786)

  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6753)

  • firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-6759)

  • firefox: thunderbird: Use-after-free in the WebRTC component (CVE-2026-6747)

  • firefox: thunderbird: Information disclosure due to uninitialized memory in the Graphics: Canvas2D component (CVE-2026-6749)

  • firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6766)

  • firefox: thunderbird: Privilege escalation in the Networking component (CVE-2026-6761)

  • firefox: thunderbird: Mitigation bypass in the File Handling component (CVE-2026-6763)

  • firefox: thunderbird: Privilege escalation in the Graphics: WebRender component (CVE-2026-6750)

  • firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6748)

  • firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6785)

  • firefox: thunderbird: Mitigation bypass in the DOM: Security component (CVE-2026-6771)

  • firefox: thunderbird: Incorrect boundary conditions in the DOM: Device Interfaces component (CVE-2026-6764)

  • firefox: thunderbird: Information disclosure in the Form Autofill component (CVE-2026-6765)

  • firefox: thunderbird: Privilege escalation in the Debugger component (CVE-2026-6769)

  • firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6751)

  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC: Networking component (CVE-2026-6776)

  • firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-6746)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Record
RLSA-2026:10757
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRLSA-2026:10766 7.5

Important: firefox security update

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.

Security Fix(es):

  • firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6772)

  • firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-6754)

  • firefox: thunderbird: Spoofing issue in the DOM: Core & HTML component (CVE-2026-6762)

  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6752)

  • firefox: thunderbird: Other issue in the Storage: IndexedDB component (CVE-2026-6770)

  • firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-6757)

  • firefox: thunderbird: Other issue in the Libraries component in NSS (CVE-2026-6767)

  • firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6786)

  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6753)

  • firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-6759)

  • firefox: thunderbird: Use-after-free in the WebRTC component (CVE-2026-6747)

  • firefox: thunderbird: Information disclosure due to uninitialized memory in the Graphics: Canvas2D component (CVE-2026-6749)

  • firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6766)

  • firefox: thunderbird: Privilege escalation in the Networking component (CVE-2026-6761)

  • firefox: thunderbird: Mitigation bypass in the File Handling component (CVE-2026-6763)

  • firefox: thunderbird: Privilege escalation in the Graphics: WebRender component (CVE-2026-6750)

  • firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6748)

  • firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6785)

  • firefox: thunderbird: Mitigation bypass in the DOM: Security component (CVE-2026-6771)

  • firefox: thunderbird: Incorrect boundary conditions in the DOM: Device Interfaces component (CVE-2026-6764)

  • firefox: thunderbird: Information disclosure in the Form Autofill component (CVE-2026-6765)

  • firefox: thunderbird: Privilege escalation in the Debugger component (CVE-2026-6769)

  • firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6751)

  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC: Networking component (CVE-2026-6776)

  • firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-6746)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Record
RLSA-2026:10766
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRLSA-2026:10767 7.5

Important: firefox security update

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.

Security Fix(es):

  • firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6772)

  • firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-6754)

  • firefox: thunderbird: Spoofing issue in the DOM: Core & HTML component (CVE-2026-6762)

  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6752)

  • firefox: thunderbird: Other issue in the Storage: IndexedDB component (CVE-2026-6770)

  • firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-6757)

  • firefox: thunderbird: Other issue in the Libraries component in NSS (CVE-2026-6767)

  • firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6786)

  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6753)

  • firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-6759)

  • firefox: thunderbird: Use-after-free in the WebRTC component (CVE-2026-6747)

  • firefox: thunderbird: Information disclosure due to uninitialized memory in the Graphics: Canvas2D component (CVE-2026-6749)

  • firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6766)

  • firefox: thunderbird: Privilege escalation in the Networking component (CVE-2026-6761)

  • firefox: thunderbird: Mitigation bypass in the File Handling component (CVE-2026-6763)

  • firefox: thunderbird: Privilege escalation in the Graphics: WebRender component (CVE-2026-6750)

  • firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6748)

  • firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6785)

  • firefox: thunderbird: Mitigation bypass in the DOM: Security component (CVE-2026-6771)

  • firefox: thunderbird: Incorrect boundary conditions in the DOM: Device Interfaces component (CVE-2026-6764)

  • firefox: thunderbird: Information disclosure in the Form Autofill component (CVE-2026-6765)

  • firefox: thunderbird: Privilege escalation in the Debugger component (CVE-2026-6769)

  • firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6751)

  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC: Networking component (CVE-2026-6776)

  • firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-6746)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Record
RLSA-2026:10767
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRLSA-2026:12285 7.5

Important: thunderbird security update

Mozilla Thunderbird is a standalone mail and newsgroup client.

Security Fix(es):

  • firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6772)

  • firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-6754)

  • firefox: thunderbird: Spoofing issue in the DOM: Core & HTML component (CVE-2026-6762)

  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6752)

  • firefox: thunderbird: Other issue in the Storage: IndexedDB component (CVE-2026-6770)

  • firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-6757)

  • firefox: thunderbird: Other issue in the Libraries component in NSS (CVE-2026-6767)

  • firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6786)

  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6753)

  • firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-6759)

  • firefox: thunderbird: Use-after-free in the WebRTC component (CVE-2026-6747)

  • firefox: thunderbird: Information disclosure due to uninitialized memory in the Graphics: Canvas2D component (CVE-2026-6749)

  • firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6766)

  • firefox: thunderbird: Privilege escalation in the Networking component (CVE-2026-6761)

  • firefox: thunderbird: Mitigation bypass in the File Handling component (CVE-2026-6763)

  • firefox: thunderbird: Privilege escalation in the Graphics: WebRender component (CVE-2026-6750)

  • firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6748)

  • firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6785)

  • firefox: thunderbird: Mitigation bypass in the DOM: Security component (CVE-2026-6771)

  • firefox: thunderbird: Incorrect boundary conditions in the DOM: Device Interfaces component (CVE-2026-6764)

  • firefox: thunderbird: Information disclosure in the Form Autofill component (CVE-2026-6765)

  • firefox: thunderbird: Privilege escalation in the Debugger component (CVE-2026-6769)

  • firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6751)

  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC: Networking component (CVE-2026-6776)

  • firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-6746)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Record
RLSA-2026:12285
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRLSA-2026:13537 7.5

Important: thunderbird security update

Mozilla Thunderbird is a standalone mail and newsgroup client.

Security Fix(es):

  • firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6772)

  • firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-6754)

  • firefox: thunderbird: Spoofing issue in the DOM: Core & HTML component (CVE-2026-6762)

  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6752)

  • firefox: thunderbird: Other issue in the Storage: IndexedDB component (CVE-2026-6770)

  • firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-6757)

  • firefox: thunderbird: Other issue in the Libraries component in NSS (CVE-2026-6767)

  • firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6786)

  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6753)

  • firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-6759)

  • firefox: thunderbird: Use-after-free in the WebRTC component (CVE-2026-6747)

  • firefox: thunderbird: Information disclosure due to uninitialized memory in the Graphics: Canvas2D component (CVE-2026-6749)

  • firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6766)

  • firefox: thunderbird: Privilege escalation in the Networking component (CVE-2026-6761)

  • firefox: thunderbird: Mitigation bypass in the File Handling component (CVE-2026-6763)

  • firefox: thunderbird: Privilege escalation in the Graphics: WebRender component (CVE-2026-6750)

  • firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6748)

  • firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6785)

  • firefox: thunderbird: Mitigation bypass in the DOM: Security component (CVE-2026-6771)

  • firefox: thunderbird: Incorrect boundary conditions in the DOM: Device Interfaces component (CVE-2026-6764)

  • firefox: thunderbird: Information disclosure in the Form Autofill component (CVE-2026-6765)

  • firefox: thunderbird: Privilege escalation in the Debugger component (CVE-2026-6769)

  • firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6751)

  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC: Networking component (CVE-2026-6776)

  • firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-6746)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Record
RLSA-2026:13537
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRLSA-2026:15892 7.5

Important: thunderbird security update

Mozilla Thunderbird is a standalone mail and newsgroup client.

Security Fix(es):

  • firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6772)

  • firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-6754)

  • firefox: thunderbird: Spoofing issue in the DOM: Core & HTML component (CVE-2026-6762)

  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6752)

  • firefox: thunderbird: Other issue in the Storage: IndexedDB component (CVE-2026-6770)

  • firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-6757)

  • firefox: thunderbird: Other issue in the Libraries component in NSS (CVE-2026-6767)

  • firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6786)

  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6753)

  • firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-6759)

  • firefox: thunderbird: Use-after-free in the WebRTC component (CVE-2026-6747)

  • firefox: thunderbird: Information disclosure due to uninitialized memory in the Graphics: Canvas2D component (CVE-2026-6749)

  • firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6766)

  • firefox: thunderbird: Privilege escalation in the Networking component (CVE-2026-6761)

  • firefox: thunderbird: Mitigation bypass in the File Handling component (CVE-2026-6763)

  • firefox: thunderbird: Privilege escalation in the Graphics: WebRender component (CVE-2026-6750)

  • firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6748)

  • firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6785)

  • firefox: thunderbird: Mitigation bypass in the DOM: Security component (CVE-2026-6771)

  • firefox: thunderbird: Incorrect boundary conditions in the DOM: Device Interfaces component (CVE-2026-6764)

  • firefox: thunderbird: Information disclosure in the Form Autofill component (CVE-2026-6765)

  • firefox: thunderbird: Privilege escalation in the Debugger component (CVE-2026-6769)

  • firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6751)

  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC: Networking component (CVE-2026-6776)

  • firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-6746)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Record
RLSA-2026:15892
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRLSA-2026:19201 7.5

Important: firefox security update

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.

Security Fix(es):

  • firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6772)

  • firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-6754)

  • firefox: thunderbird: Spoofing issue in the DOM: Core & HTML component (CVE-2026-6762)

  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6752)

  • firefox: thunderbird: Other issue in the Storage: IndexedDB component (CVE-2026-6770)

  • firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-6757)

  • firefox: thunderbird: Other issue in the Libraries component in NSS (CVE-2026-6767)

  • firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6786)

  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6753)

  • firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-6759)

  • firefox: thunderbird: Use-after-free in the WebRTC component (CVE-2026-6747)

  • firefox: thunderbird: Information disclosure due to uninitialized memory in the Graphics: Canvas2D component (CVE-2026-6749)

  • firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6766)

  • firefox: thunderbird: Privilege escalation in the Networking component (CVE-2026-6761)

  • firefox: thunderbird: Mitigation bypass in the File Handling component (CVE-2026-6763)

  • firefox: thunderbird: Privilege escalation in the Graphics: WebRender component (CVE-2026-6750)

  • firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6748)

  • firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6785)

  • firefox: thunderbird: Mitigation bypass in the DOM: Security component (CVE-2026-6771)

  • firefox: thunderbird: Incorrect boundary conditions in the DOM: Device Interfaces component (CVE-2026-6764)

  • firefox: thunderbird: Information disclosure in the Form Autofill component (CVE-2026-6765)

  • firefox: thunderbird: Privilege escalation in the Debugger component (CVE-2026-6769)

  • firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6751)

  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC: Networking component (CVE-2026-6776)

  • firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-6746)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Record
RLSA-2026:19201
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRLSA-2026:19348 8.8

Important: thunderbird security update

Mozilla Thunderbird is a standalone mail and newsgroup client.

Security Fix(es):

  • firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6772)

  • firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-6754)

  • firefox: thunderbird: Spoofing issue in the DOM: Core & HTML component (CVE-2026-6762)

  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6752)

  • firefox: thunderbird: Other issue in the Storage: IndexedDB component (CVE-2026-6770)

  • firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-6757)

  • firefox: thunderbird: Other issue in the Libraries component in NSS (CVE-2026-6767)

  • firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6786)

  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6753)

  • firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-6759)

  • firefox: thunderbird: Use-after-free in the WebRTC component (CVE-2026-6747)

  • firefox: thunderbird: Information disclosure due to uninitialized memory in the Graphics: Canvas2D component (CVE-2026-6749)

  • firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6766)

  • firefox: thunderbird: Privilege escalation in the Networking component (CVE-2026-6761)

  • firefox: thunderbird: Mitigation bypass in the File Handling component (CVE-2026-6763)

  • firefox: thunderbird: Privilege escalation in the Graphics: WebRender component (CVE-2026-6750)

  • firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6748)

  • firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6785)

  • firefox: thunderbird: Mitigation bypass in the DOM: Security component (CVE-2026-6771)

  • firefox: thunderbird: Incorrect boundary conditions in the DOM: Device Interfaces component (CVE-2026-6764)

  • firefox: thunderbird: Information disclosure in the Form Autofill component (CVE-2026-6765)

  • firefox: thunderbird: Privilege escalation in the Debugger component (CVE-2026-6769)

  • firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6751)

  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC: Networking component (CVE-2026-6776)

  • firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-6746)

  • firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10.1 and Firefox 150.0.1 (CVE-2026-7323)

  • firefox: thunderbird: Information disclosure due to incorrect boundary conditions in the Audio/Video component (CVE-2026-7320)

  • firefox: thunderbird: Memory safety bugs fixed in Thunderbird ESR 140.10.1 and Thunderbird 150.0.1 (CVE-2026-7322)

  • firefox: thunderbird: webrtc: Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component (CVE-2026-7321)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Record
RLSA-2026:19348
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVROOT-OS-DEBIAN-11-CVE-2026-6766 6.1

CVE-2026-6766 in rootio-nss - Patched by Root

Root has patched CVE-2026-6766 in the rootio-nss package for Root:Debian:11. Multiple fixed versions available.

Record
ROOT-OS-DEBIAN-11-CVE-2026-6766
CVSS 3.1
6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated
2026-11-02
OSVROOT-OS-DEBIAN-12-CVE-2026-6766 6.1

CVE-2026-6766 in nss - Patched by Root

Root has patched CVE-2026-6766 in the nss package for Root:Debian:12. Multiple fixed versions available.

Record
ROOT-OS-DEBIAN-12-CVE-2026-6766
CVSS 3.1
6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated
2026-11-02
OSVROOT-OS-DEBIAN-13-CVE-2026-6766 6.1

CVE-2026-6766 in rootio-nss - Patched by Root

Root has patched CVE-2026-6766 in the rootio-nss package for Root:Debian:13. Multiple fixed versions available.

Record
ROOT-OS-DEBIAN-13-CVE-2026-6766
CVSS 3.1
6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated
2026-11-02
OSVUBUNTU-CVE-2026-6766 7.5

Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

Record
UBUNTU-CVE-2026-6766
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSVALSA-2026:10757 No score

Important: firefox security update

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.

Security Fix(es):

  • firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6772)
  • firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-6754)
  • firefox: thunderbird: Spoofing issue in the DOM: Core & HTML component (CVE-2026-6762)
  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6752)
  • firefox: thunderbird: Other issue in the Storage: IndexedDB component (CVE-2026-6770)
  • firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-6757)
  • firefox: thunderbird: Other issue in the Libraries component in NSS (CVE-2026-6767)
  • firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6786)
  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6753)
  • firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-6759)
  • firefox: thunderbird: Use-after-free in the WebRTC component (CVE-2026-6747)
  • firefox: thunderbird: Information disclosure due to uninitialized memory in the Graphics: Canvas2D component (CVE-2026-6749)
  • firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6766)
  • firefox: thunderbird: Privilege escalation in the Networking component (CVE-2026-6761)
  • firefox: thunderbird: Mitigation bypass in the File Handling component (CVE-2026-6763)
  • firefox: thunderbird: Privilege escalation in the Graphics: WebRender component (CVE-2026-6750)
  • firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6748)
  • firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6785)
  • firefox: thunderbird: Mitigation bypass in the DOM: Security component (CVE-2026-6771)
  • firefox: thunderbird: Incorrect boundary conditions in the DOM: Device Interfaces component (CVE-2026-6764)
  • firefox: thunderbird: Information disclosure in the Form Autofill component (CVE-2026-6765)
  • firefox: thunderbird: Privilege escalation in the Debugger component (CVE-2026-6769)
  • firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6751)
  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC: Networking component (CVE-2026-6776)
  • firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-6746)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Record
ALSA-2026:10757
Updated
2026-11-02
OSVALSA-2026:10766 No score

Important: firefox security update

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.

Security Fix(es):

  • firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6772)
  • firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-6754)
  • firefox: thunderbird: Spoofing issue in the DOM: Core & HTML component (CVE-2026-6762)
  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6752)
  • firefox: thunderbird: Other issue in the Storage: IndexedDB component (CVE-2026-6770)
  • firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-6757)
  • firefox: thunderbird: Other issue in the Libraries component in NSS (CVE-2026-6767)
  • firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6786)
  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6753)
  • firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-6759)
  • firefox: thunderbird: Use-after-free in the WebRTC component (CVE-2026-6747)
  • firefox: thunderbird: Information disclosure due to uninitialized memory in the Graphics: Canvas2D component (CVE-2026-6749)
  • firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6766)
  • firefox: thunderbird: Privilege escalation in the Networking component (CVE-2026-6761)
  • firefox: thunderbird: Mitigation bypass in the File Handling component (CVE-2026-6763)
  • firefox: thunderbird: Privilege escalation in the Graphics: WebRender component (CVE-2026-6750)
  • firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6748)
  • firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6785)
  • firefox: thunderbird: Mitigation bypass in the DOM: Security component (CVE-2026-6771)
  • firefox: thunderbird: Incorrect boundary conditions in the DOM: Device Interfaces component (CVE-2026-6764)
  • firefox: thunderbird: Information disclosure in the Form Autofill component (CVE-2026-6765)
  • firefox: thunderbird: Privilege escalation in the Debugger component (CVE-2026-6769)
  • firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6751)
  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC: Networking component (CVE-2026-6776)
  • firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-6746)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Record
ALSA-2026:10766
Updated
2026-11-02
OSVALSA-2026:10767 No score

Important: firefox security update

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.

Security Fix(es):

  • firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6772)
  • firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-6754)
  • firefox: thunderbird: Spoofing issue in the DOM: Core & HTML component (CVE-2026-6762)
  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6752)
  • firefox: thunderbird: Other issue in the Storage: IndexedDB component (CVE-2026-6770)
  • firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-6757)
  • firefox: thunderbird: Other issue in the Libraries component in NSS (CVE-2026-6767)
  • firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6786)
  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6753)
  • firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-6759)
  • firefox: thunderbird: Use-after-free in the WebRTC component (CVE-2026-6747)
  • firefox: thunderbird: Information disclosure due to uninitialized memory in the Graphics: Canvas2D component (CVE-2026-6749)
  • firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6766)
  • firefox: thunderbird: Privilege escalation in the Networking component (CVE-2026-6761)
  • firefox: thunderbird: Mitigation bypass in the File Handling component (CVE-2026-6763)
  • firefox: thunderbird: Privilege escalation in the Graphics: WebRender component (CVE-2026-6750)
  • firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6748)
  • firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6785)
  • firefox: thunderbird: Mitigation bypass in the DOM: Security component (CVE-2026-6771)
  • firefox: thunderbird: Incorrect boundary conditions in the DOM: Device Interfaces component (CVE-2026-6764)
  • firefox: thunderbird: Information disclosure in the Form Autofill component (CVE-2026-6765)
  • firefox: thunderbird: Privilege escalation in the Debugger component (CVE-2026-6769)
  • firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6751)
  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC: Networking component (CVE-2026-6776)
  • firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-6746)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Record
ALSA-2026:10767
Updated
2026-11-02
OSVALSA-2026:12285 No score

Important: thunderbird security update

Mozilla Thunderbird is a standalone mail and newsgroup client.

Security Fix(es):

  • firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6772)
  • firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-6754)
  • firefox: thunderbird: Spoofing issue in the DOM: Core & HTML component (CVE-2026-6762)
  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6752)
  • firefox: thunderbird: Other issue in the Storage: IndexedDB component (CVE-2026-6770)
  • firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-6757)
  • firefox: thunderbird: Other issue in the Libraries component in NSS (CVE-2026-6767)
  • firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6786)
  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6753)
  • firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-6759)
  • firefox: thunderbird: Use-after-free in the WebRTC component (CVE-2026-6747)
  • firefox: thunderbird: Information disclosure due to uninitialized memory in the Graphics: Canvas2D component (CVE-2026-6749)
  • firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6766)
  • firefox: thunderbird: Privilege escalation in the Networking component (CVE-2026-6761)
  • firefox: thunderbird: Mitigation bypass in the File Handling component (CVE-2026-6763)
  • firefox: thunderbird: Privilege escalation in the Graphics: WebRender component (CVE-2026-6750)
  • firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6748)
  • firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6785)
  • firefox: thunderbird: Mitigation bypass in the DOM: Security component (CVE-2026-6771)
  • firefox: thunderbird: Incorrect boundary conditions in the DOM: Device Interfaces component (CVE-2026-6764)
  • firefox: thunderbird: Information disclosure in the Form Autofill component (CVE-2026-6765)
  • firefox: thunderbird: Privilege escalation in the Debugger component (CVE-2026-6769)
  • firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6751)
  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC: Networking component (CVE-2026-6776)
  • firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-6746)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Record
ALSA-2026:12285
Updated
2026-11-02
OSVALSA-2026:13537 No score

Important: thunderbird security update

Mozilla Thunderbird is a standalone mail and newsgroup client.

Security Fix(es):

  • firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6772)
  • firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-6754)
  • firefox: thunderbird: Spoofing issue in the DOM: Core & HTML component (CVE-2026-6762)
  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6752)
  • firefox: thunderbird: Other issue in the Storage: IndexedDB component (CVE-2026-6770)
  • firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-6757)
  • firefox: thunderbird: Other issue in the Libraries component in NSS (CVE-2026-6767)
  • firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6786)
  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6753)
  • firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-6759)
  • firefox: thunderbird: Use-after-free in the WebRTC component (CVE-2026-6747)
  • firefox: thunderbird: Information disclosure due to uninitialized memory in the Graphics: Canvas2D component (CVE-2026-6749)
  • firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6766)
  • firefox: thunderbird: Privilege escalation in the Networking component (CVE-2026-6761)
  • firefox: thunderbird: Mitigation bypass in the File Handling component (CVE-2026-6763)
  • firefox: thunderbird: Privilege escalation in the Graphics: WebRender component (CVE-2026-6750)
  • firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6748)
  • firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6785)
  • firefox: thunderbird: Mitigation bypass in the DOM: Security component (CVE-2026-6771)
  • firefox: thunderbird: Incorrect boundary conditions in the DOM: Device Interfaces component (CVE-2026-6764)
  • firefox: thunderbird: Information disclosure in the Form Autofill component (CVE-2026-6765)
  • firefox: thunderbird: Privilege escalation in the Debugger component (CVE-2026-6769)
  • firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6751)
  • firefox: thunderbird: Incorrect boundary conditions in the WebRTC: Networking component (CVE-2026-6776)
  • firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-6746)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Record
ALSA-2026:13537
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
firefox
AlmaLinux:9
From an advisory covering 25 CVEs
 before 140.10.0-1.el9_7.alma.1
140.10.0-1.el9_7.alma.1
firefox-x11
AlmaLinux:9
From an advisory covering 25 CVEs
 before 140.10.0-1.el9_7.alma.1
140.10.0-1.el9_7.alma.1
firefox
AlmaLinux:8
From an advisory covering 26 CVEs
 before 140.10.0-1.el8_10.alma.1
140.10.0-1.el8_10.alma.1
firefox
AlmaLinux:10
From an advisory covering 25 CVEs
 before 140.10.0-1.el10_1
140.10.0-1.el10_1
thunderbird
AlmaLinux:10
From an advisory covering 25 CVEs
 before 140.10.0-1.el10_1.alma.1
140.10.0-1.el10_1.alma.1
thunderbird
AlmaLinux:8
From an advisory covering 26 CVEs
 before 140.10.0-1.el8_10.alma.1
140.10.0-1.el8_10.alma.1
thunderbird
AlmaLinux:9
From an advisory covering 25 CVEs
 before 140.10.0-1.el9_7.alma.1
140.10.0-1.el9_7.alma.1
thunderbird
AlmaLinux:9
From an advisory covering 29 CVEs
 before 140.10.1-1.el9_8.alma.1
140.10.1-1.el9_8.alma.1
firefox-esr
Debian:12
 before 140.10.0esr-1~deb12u1, plus listed versions
102.11.0esr-1102.12.0esr-1102.12.0esr-1~deb10u1102.12.0esr-1~deb11u1102.12.0esr-1~deb12u1
Show 45 moreShow less
102.13.0esr-1102.13.0esr-1~deb10u1102.13.0esr-1~deb11u1102.13.0esr-1~deb12u1102.14.0esr-1~deb10u1102.14.0esr-1~deb11u1102.14.0esr-1~deb12u1102.15.0esr-1~deb10u1102.15.0esr-1~deb11u1102.15.0esr-1~deb12u1102.15.1esr-1~deb10u1102.15.1esr-1~deb11u1102.15.1esr-1~deb12u1115.0.2esr-1115.1.0esr-1115.10.0esr-1115.10.0esr-1~deb10u1115.10.0esr-1~deb11u1115.10.0esr-1~deb12u1115.11.0esr-1115.11.0esr-1~deb10u1115.11.0esr-1~deb11u1115.11.0esr-1~deb12u1115.12.0esr-1115.12.0esr-1~deb10u1115.12.0esr-1~deb11u1115.12.0esr-1~deb12u1115.13.0esr-1115.13.0esr-1~deb11u1115.13.0esr-1~deb12u1115.13.0esr-2115.14.0esr-1115.14.0esr-1~deb11u1115.14.0esr-1~deb12u1115.15.0esr-1115.15.0esr-1~deb11u1115.15.0esr-1~deb12u1115.2.0esr-1115.2.1esr-1115.3.0esr-1115.3.0esr-1~deb10u1115.3.0esr-1~deb11u1115.3.0esr-1~deb12u1115.3.1esr-1~deb10u1115.3.1esr-1~deb11u1
140.10.0esr-1~deb12u1
firefox-esr
Debian:13
 before 140.10.0esr-1~deb13u1, plus listed versions
128.13.0esr-1128.14.0esr-1128.14.0esr-1~deb11u1128.14.0esr-1~deb12u1128.14.0esr-1~deb13u1
Show 41 moreShow less
140.10.0esr-1~deb11u1140.10.0esr-1~deb12u1140.3.0esr-1140.3.0esr-1~deb11u1140.3.0esr-1~deb11u2140.3.0esr-1~deb12u1140.3.0esr-1~deb13u1140.3.0esr-2140.3.1esr-1140.3.1esr-1~deb11u1140.3.1esr-1~deb12u1140.3.1esr-1~deb13u1140.3.1esr-2140.4.0esr-1140.4.0esr-1~deb11u1140.4.0esr-1~deb12u1140.4.0esr-1~deb13u1140.5.0esr-1140.5.0esr-1~deb11u1140.5.0esr-1~deb12u1140.5.0esr-1~deb13u1140.6.0esr-1140.6.0esr-1~deb11u1140.6.0esr-1~deb12u1140.6.0esr-1~deb13u1140.7.0esr-1140.7.0esr-1~deb11u1140.7.0esr-1~deb12u1140.7.0esr-1~deb13u1140.8.0esr-1140.8.0esr-1~deb11u1140.8.0esr-1~deb12u1140.8.0esr-1~deb13u1140.9.0esr-1140.9.0esr-1~deb11u1140.9.0esr-1~deb12u1140.9.0esr-1~deb13u1140.9.1esr-1140.9.1esr-1~deb11u1140.9.1esr-1~deb12u1140.9.1esr-1~deb13u1
140.10.0esr-1~deb13u1
Show 145 moreShow less
Affected packages
PackageAffectedFixed
firefox-esr
Debian:14
 before 140.10.0esr-1, plus listed versions
128.13.0esr-1128.14.0esr-1128.14.0esr-1~deb11u1128.14.0esr-1~deb12u1128.14.0esr-1~deb13u1
Show 42 moreShow less
140.10.0esr-1~deb11u1140.10.0esr-1~deb12u1140.10.0esr-1~deb13u1140.3.0esr-1140.3.0esr-1~deb11u1140.3.0esr-1~deb11u2140.3.0esr-1~deb12u1140.3.0esr-1~deb13u1140.3.0esr-2140.3.1esr-1140.3.1esr-1~deb11u1140.3.1esr-1~deb12u1140.3.1esr-1~deb13u1140.3.1esr-2140.4.0esr-1140.4.0esr-1~deb11u1140.4.0esr-1~deb12u1140.4.0esr-1~deb13u1140.5.0esr-1140.5.0esr-1~deb11u1140.5.0esr-1~deb12u1140.5.0esr-1~deb13u1140.6.0esr-1140.6.0esr-1~deb11u1140.6.0esr-1~deb12u1140.6.0esr-1~deb13u1140.7.0esr-1140.7.0esr-1~deb11u1140.7.0esr-1~deb12u1140.7.0esr-1~deb13u1140.8.0esr-1140.8.0esr-1~deb11u1140.8.0esr-1~deb12u1140.8.0esr-1~deb13u1140.9.0esr-1140.9.0esr-1~deb11u1140.9.0esr-1~deb12u1140.9.0esr-1~deb13u1140.9.1esr-1140.9.1esr-1~deb11u1140.9.1esr-1~deb12u1140.9.1esr-1~deb13u1
140.10.0esr-1
nss
Debian:12
 before 2:3.87.1-1+deb12u3, plus listed versions
2:3.87.1-12:3.87.1-1+deb12u12:3.87.1-1+deb12u2
2:3.87.1-1+deb12u3
nss
Debian:13
 before 2:3.110-1+deb13u2, plus listed versions
2:3.110-12:3.110-1+deb13u1
2:3.110-1+deb13u2
nss
Debian:14
 before 2:3.123-1, plus listed versions
2:3.110-12:3.111-12:3.112-12:3.114-12:3.116-1
Show 4 moreShow less
2:3.117-12:3.119-12:3.120-12:3.121-1
2:3.123-1
thunderbird
Debian:12
 before 1:140.10.0esr-1~deb12u1, plus listed versions
1:102.11.0-11:102.12.0-11:102.12.0-1~deb10u11:102.12.0-1~deb11u11:102.12.0-1~deb12u1
Show 45 moreShow less
1:102.13.0-11:102.13.0-1~deb10u11:102.13.0-1~deb11u11:102.13.0-1~deb12u11:102.13.1-11:102.13.1-1~deb10u11:102.13.1-1~deb11u11:102.13.1-1~deb12u11:102.14.0-1~deb10u11:102.14.0-1~deb11u11:102.14.0-1~deb12u11:102.15.0-1~deb10u11:102.15.0-1~deb11u11:102.15.0-1~deb12u11:102.15.1-1~deb10u11:102.15.1-1~deb11u11:102.15.1-1~deb12u11:103.0~b5-11:104.0~b2-11:110.0~b4-11:112.0~b1-11:113.0~b3-11:114.0~b2-11:115.0-11:115.0.1-11:115.0.1-21:115.0~b4-11:115.0~b6-11:115.1.0-11:115.1.1-11:115.10.1-11:115.10.1-1~deb10u11:115.10.1-1~deb11u11:115.10.1-1~deb12u11:115.11.0-11:115.11.0-1~deb10u11:115.11.0-1~deb11u11:115.11.0-1~deb12u11:115.12.0-11:115.12.0-1~deb10u11:115.12.0-1~deb11u11:115.12.0-1~deb12u11:115.13.0-11:115.13.0-1~deb11u11:115.13.0-1~deb12u1
1:140.10.0esr-1~deb12u1
thunderbird
Debian:13
 before 1:140.10.0esr-1~deb13u1, plus listed versions
1:128.13.0esr-11:128.14.0esr-11:128.14.0esr-1~deb11u11:128.14.0esr-1~deb12u11:128.14.0esr-1~deb13u1
Show 45 moreShow less
1:129.0~b6-11:130.0~b3-11:132.0~b6-11:135.0-11:136.0-11:137.0-11:138.0-11:140.0.1esr-11:140.1.0esr-11:140.1.1esr-11:140.10.0esr-1~deb11u11:140.10.0esr-1~deb12u11:140.2.0esr-11:140.3.0esr-11:140.3.0esr-1~deb11u11:140.3.0esr-1~deb12u11:140.3.0esr-1~deb13u11:140.3.1esr-11:140.4.0esr-11:140.4.0esr-1~deb11u11:140.4.0esr-1~deb12u11:140.4.0esr-1~deb13u11:140.5.0esr-11:140.5.0esr-1~deb11u11:140.5.0esr-1~deb12u11:140.5.0esr-1~deb13u11:140.6.0esr-11:140.6.0esr-1~deb11u11:140.6.0esr-1~deb12u11:140.6.0esr-1~deb13u11:140.7.0esr-11:140.7.0esr-1~deb11u11:140.7.0esr-1~deb12u11:140.7.0esr-1~deb13u11:140.7.1esr-11:140.7.1esr-1~deb11u11:140.7.1esr-1~deb12u11:140.7.1esr-1~deb13u11:140.8.0esr-11:140.8.0esr-1~deb11u11:140.8.0esr-1~deb12u11:140.8.0esr-1~deb13u11:140.9.0esr-11:140.9.0esr-1~deb11u11:140.9.0esr-1~deb12u1
1:140.10.0esr-1~deb13u1
thunderbird
Debian:14
 before 1:140.10.0esr-1, plus listed versions
1:128.13.0esr-11:128.14.0esr-11:128.14.0esr-1~deb11u11:128.14.0esr-1~deb12u11:128.14.0esr-1~deb13u1
Show 45 moreShow less
1:129.0~b6-11:130.0~b3-11:132.0~b6-11:135.0-11:136.0-11:137.0-11:138.0-11:140.0.1esr-11:140.1.0esr-11:140.1.1esr-11:140.10.0esr-1~deb11u11:140.10.0esr-1~deb12u11:140.10.0esr-1~deb13u11:140.2.0esr-11:140.3.0esr-11:140.3.0esr-1~deb11u11:140.3.0esr-1~deb12u11:140.3.0esr-1~deb13u11:140.3.1esr-11:140.4.0esr-11:140.4.0esr-1~deb11u11:140.4.0esr-1~deb12u11:140.4.0esr-1~deb13u11:140.5.0esr-11:140.5.0esr-1~deb11u11:140.5.0esr-1~deb12u11:140.5.0esr-1~deb13u11:140.6.0esr-11:140.6.0esr-1~deb11u11:140.6.0esr-1~deb12u11:140.6.0esr-1~deb13u11:140.7.0esr-11:140.7.0esr-1~deb11u11:140.7.0esr-1~deb12u11:140.7.0esr-1~deb13u11:140.7.1esr-11:140.7.1esr-1~deb11u11:140.7.1esr-1~deb12u11:140.7.1esr-1~deb13u11:140.8.0esr-11:140.8.0esr-1~deb11u11:140.8.0esr-1~deb12u11:140.8.0esr-1~deb13u11:140.9.0esr-11:140.9.0esr-1~deb11u1
1:140.10.0esr-1
rootcerts
Mageia:9
From an advisory covering 17 CVEs
 before 20260412.00-1.mga9
20260412.00-1.mga9
nss
Mageia:9
From an advisory covering 17 CVEs
 before 3.123.1-1.mga9
3.123.1-1.mga9
firefox
Mageia:9
From an advisory covering 17 CVEs
 before 140.10.1-1.mga9
140.10.1-1.mga9
firefox-l10n
Mageia:9
From an advisory covering 17 CVEs
 before 140.10.1-1.mga9
140.10.1-1.mga9
firefox
openEuler:22.03-LTS-SP4
From an advisory covering 25 CVEs
 before 140.10.0-1.oe2203sp4
140.10.0-1.oe2203sp4
firefox
openEuler:24.03-LTS
From an advisory covering 25 CVEs
 before 140.10.0-1.oe2403
140.10.0-1.oe2403
firefox
openEuler:24.03-LTS-SP1
From an advisory covering 25 CVEs
 before 140.10.0-1.oe2403sp1
140.10.0-1.oe2403sp1
firefox
openEuler:24.03-LTS-SP3
From an advisory covering 25 CVEs
 before 140.10.0-1.oe2403sp3
140.10.0-1.oe2403sp3
thunderbird
openEuler:24.03-LTS-SP3
From an advisory covering 30 CVEs
 before 140.10.0-1.oe2403sp3
140.10.0-1.oe2403sp3
firefox
Red Hat:enterprise_linux:9::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_7
0:140.10.0-1.el9_7
firefox-debuginfo
Red Hat:enterprise_linux:9::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_7
0:140.10.0-1.el9_7
firefox-debugsource
Red Hat:enterprise_linux:9::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_7
0:140.10.0-1.el9_7
firefox-x11
Red Hat:enterprise_linux:9::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_7
0:140.10.0-1.el9_7
firefox
Red Hat:enterprise_linux:8::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_10
0:140.10.0-1.el8_10
firefox-debuginfo
Red Hat:enterprise_linux:8::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_10
0:140.10.0-1.el8_10
firefox-debugsource
Red Hat:enterprise_linux:8::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_10
0:140.10.0-1.el8_10
firefox
Red Hat:enterprise_linux:10.1
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el10_1
0:140.10.0-1.el10_1
firefox-debuginfo
Red Hat:enterprise_linux:10.1
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el10_1
0:140.10.0-1.el10_1
firefox-debugsource
Red Hat:enterprise_linux:10.1
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el10_1
0:140.10.0-1.el10_1
thunderbird
Red Hat:enterprise_linux:10.1
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el10_1
0:140.10.0-1.el10_1
thunderbird-debuginfo
Red Hat:enterprise_linux:10.1
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el10_1
0:140.10.0-1.el10_1
thunderbird-debugsource
Red Hat:enterprise_linux:10.1
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el10_1
0:140.10.0-1.el10_1
thunderbird
Red Hat:enterprise_linux:8::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_10
0:140.10.0-1.el8_10
thunderbird-debuginfo
Red Hat:enterprise_linux:8::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_10
0:140.10.0-1.el8_10
thunderbird-debugsource
Red Hat:enterprise_linux:8::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_10
0:140.10.0-1.el8_10
thunderbird
Red Hat:enterprise_linux:9::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_7
0:140.10.0-1.el9_7
thunderbird-debuginfo
Red Hat:enterprise_linux:9::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_7
0:140.10.0-1.el9_7
thunderbird-debugsource
Red Hat:enterprise_linux:9::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_7
0:140.10.0-1.el9_7
firefox
Red Hat:rhel_e4s:8.8::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_8
0:140.10.0-1.el8_8
firefox-debuginfo
Red Hat:rhel_e4s:8.8::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_8
0:140.10.0-1.el8_8
firefox-debugsource
Red Hat:rhel_e4s:8.8::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_8
0:140.10.0-1.el8_8
firefox
Red Hat:rhel_tus:8.8::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_8
0:140.10.0-1.el8_8
firefox-debuginfo
Red Hat:rhel_tus:8.8::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_8
0:140.10.0-1.el8_8
firefox-debugsource
Red Hat:rhel_tus:8.8::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_8
0:140.10.0-1.el8_8
firefox
Red Hat:rhel_e4s:9.0::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_0
0:140.10.0-1.el9_0
firefox-debuginfo
Red Hat:rhel_e4s:9.0::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_0
0:140.10.0-1.el9_0
firefox-debugsource
Red Hat:rhel_e4s:9.0::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_0
0:140.10.0-1.el9_0
firefox
Red Hat:rhel_eus:9.6::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_6
0:140.10.0-1.el9_6
firefox-debuginfo
Red Hat:rhel_eus:9.6::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_6
0:140.10.0-1.el9_6
firefox-debugsource
Red Hat:rhel_eus:9.6::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_6
0:140.10.0-1.el9_6
firefox-x11
Red Hat:rhel_eus:9.6::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_6
0:140.10.0-1.el9_6
firefox
Red Hat:rhel_e4s:9.2::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_2
0:140.10.0-1.el9_2
firefox-debuginfo
Red Hat:rhel_e4s:9.2::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_2
0:140.10.0-1.el9_2
firefox-debugsource
Red Hat:rhel_e4s:9.2::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_2
0:140.10.0-1.el9_2
firefox-x11
Red Hat:rhel_e4s:9.2::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_2
0:140.10.0-1.el9_2
firefox
Red Hat:enterprise_linux_eus:10.0
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el10_0
0:140.10.0-1.el10_0
firefox-debuginfo
Red Hat:enterprise_linux_eus:10.0
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el10_0
0:140.10.0-1.el10_0
firefox-debugsource
Red Hat:enterprise_linux_eus:10.0
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el10_0
0:140.10.0-1.el10_0
firefox
Red Hat:enterprise_linux:10.2
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el10_2
0:140.10.0-1.el10_2
firefox-debuginfo
Red Hat:enterprise_linux:10.2
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el10_2
0:140.10.0-1.el10_2
firefox-debugsource
Red Hat:enterprise_linux:10.2
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el10_2
0:140.10.0-1.el10_2
thunderbird
Red Hat:enterprise_linux:10.2
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el10_2
0:140.10.0-1.el10_2
thunderbird-debuginfo
Red Hat:enterprise_linux:10.2
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el10_2
0:140.10.0-1.el10_2
thunderbird-debugsource
Red Hat:enterprise_linux:10.2
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el10_2
0:140.10.0-1.el10_2
firefox
Red Hat:enterprise_linux:9::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_8
0:140.10.0-1.el9_8
firefox-debuginfo
Red Hat:enterprise_linux:9::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_8
0:140.10.0-1.el9_8
firefox-debugsource
Red Hat:enterprise_linux:9::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_8
0:140.10.0-1.el9_8
firefox-x11
Red Hat:enterprise_linux:9::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_8
0:140.10.0-1.el9_8
thunderbird
Red Hat:enterprise_linux:9::appstream
From an advisory covering 30 CVEs
 before 0:140.10.1-1.el9_8
0:140.10.1-1.el9_8
thunderbird-debuginfo
Red Hat:enterprise_linux:9::appstream
From an advisory covering 30 CVEs
 before 0:140.10.1-1.el9_8
0:140.10.1-1.el9_8
thunderbird-debugsource
Red Hat:enterprise_linux:9::appstream
From an advisory covering 30 CVEs
 before 0:140.10.1-1.el9_8
0:140.10.1-1.el9_8
thunderbird
Red Hat:rhel_e4s:9.2::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_2
0:140.10.0-1.el9_2
thunderbird-debuginfo
Red Hat:rhel_e4s:9.2::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_2
0:140.10.0-1.el9_2
thunderbird-debugsource
Red Hat:rhel_e4s:9.2::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_2
0:140.10.0-1.el9_2
thunderbird
Red Hat:rhel_eus:9.6::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_6
0:140.10.0-1.el9_6
thunderbird-debuginfo
Red Hat:rhel_eus:9.6::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_6
0:140.10.0-1.el9_6
thunderbird-debugsource
Red Hat:rhel_eus:9.6::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_6
0:140.10.0-1.el9_6
thunderbird
Red Hat:enterprise_linux_eus:10.0
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el10_0
0:140.10.0-1.el10_0
thunderbird-debuginfo
Red Hat:enterprise_linux_eus:10.0
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el10_0
0:140.10.0-1.el10_0
thunderbird-debugsource
Red Hat:enterprise_linux_eus:10.0
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el10_0
0:140.10.0-1.el10_0
firefox
Red Hat:rhel_eus:9.4::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_4
0:140.10.0-1.el9_4
firefox-debuginfo
Red Hat:rhel_eus:9.4::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_4
0:140.10.0-1.el9_4
firefox-debugsource
Red Hat:rhel_eus:9.4::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_4
0:140.10.0-1.el9_4
firefox-x11
Red Hat:rhel_eus:9.4::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_4
0:140.10.0-1.el9_4
thunderbird
Red Hat:rhel_aus:8.4::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_4
0:140.10.0-1.el8_4
thunderbird-debuginfo
Red Hat:rhel_aus:8.4::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_4
0:140.10.0-1.el8_4
thunderbird-debugsource
Red Hat:rhel_aus:8.4::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_4
0:140.10.0-1.el8_4
thunderbird
Red Hat:rhel_eus_long_life:8.4::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_4
0:140.10.0-1.el8_4
thunderbird-debuginfo
Red Hat:rhel_eus_long_life:8.4::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_4
0:140.10.0-1.el8_4
thunderbird-debugsource
Red Hat:rhel_eus_long_life:8.4::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_4
0:140.10.0-1.el8_4
thunderbird
Red Hat:rhel_aus:8.6::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_6
0:140.10.0-1.el8_6
thunderbird-debuginfo
Red Hat:rhel_aus:8.6::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_6
0:140.10.0-1.el8_6
thunderbird-debugsource
Red Hat:rhel_aus:8.6::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_6
0:140.10.0-1.el8_6
thunderbird
Red Hat:rhel_e4s:8.6::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_6
0:140.10.0-1.el8_6
thunderbird-debuginfo
Red Hat:rhel_e4s:8.6::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_6
0:140.10.0-1.el8_6
thunderbird-debugsource
Red Hat:rhel_e4s:8.6::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_6
0:140.10.0-1.el8_6
thunderbird
Red Hat:rhel_tus:8.6::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_6
0:140.10.0-1.el8_6
thunderbird-debuginfo
Red Hat:rhel_tus:8.6::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_6
0:140.10.0-1.el8_6
thunderbird-debugsource
Red Hat:rhel_tus:8.6::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_6
0:140.10.0-1.el8_6
thunderbird
Red Hat:rhel_e4s:8.8::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_8
0:140.10.0-1.el8_8
thunderbird-debuginfo
Red Hat:rhel_e4s:8.8::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_8
0:140.10.0-1.el8_8
thunderbird-debugsource
Red Hat:rhel_e4s:8.8::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_8
0:140.10.0-1.el8_8
thunderbird
Red Hat:rhel_tus:8.8::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_8
0:140.10.0-1.el8_8
thunderbird-debuginfo
Red Hat:rhel_tus:8.8::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_8
0:140.10.0-1.el8_8
thunderbird-debugsource
Red Hat:rhel_tus:8.8::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_8
0:140.10.0-1.el8_8
thunderbird
Red Hat:rhel_e4s:9.0::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_0
0:140.10.0-1.el9_0
thunderbird-debuginfo
Red Hat:rhel_e4s:9.0::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_0
0:140.10.0-1.el9_0
thunderbird-debugsource
Red Hat:rhel_e4s:9.0::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_0
0:140.10.0-1.el9_0
thunderbird
Red Hat:rhel_eus:9.4::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_4
0:140.10.0-1.el9_4
thunderbird-debuginfo
Red Hat:rhel_eus:9.4::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_4
0:140.10.0-1.el9_4
thunderbird-debugsource
Red Hat:rhel_eus:9.4::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_4
0:140.10.0-1.el9_4
firefox
Red Hat:rhel_aus:8.6::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_6
0:140.10.0-1.el8_6
firefox-debuginfo
Red Hat:rhel_aus:8.6::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_6
0:140.10.0-1.el8_6
firefox-debugsource
Red Hat:rhel_aus:8.6::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_6
0:140.10.0-1.el8_6
firefox
Red Hat:rhel_e4s:8.6::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_6
0:140.10.0-1.el8_6
firefox-debuginfo
Red Hat:rhel_e4s:8.6::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_6
0:140.10.0-1.el8_6
firefox-debugsource
Red Hat:rhel_e4s:8.6::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_6
0:140.10.0-1.el8_6
firefox
Red Hat:rhel_tus:8.6::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_6
0:140.10.0-1.el8_6
firefox-debuginfo
Red Hat:rhel_tus:8.6::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_6
0:140.10.0-1.el8_6
firefox-debugsource
Red Hat:rhel_tus:8.6::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_6
0:140.10.0-1.el8_6
firefox
Red Hat:rhel_aus:8.4::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_4
0:140.10.0-1.el8_4
firefox-debuginfo
Red Hat:rhel_aus:8.4::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_4
0:140.10.0-1.el8_4
firefox-debugsource
Red Hat:rhel_aus:8.4::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_4
0:140.10.0-1.el8_4
firefox
Red Hat:rhel_eus_long_life:8.4::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_4
0:140.10.0-1.el8_4
firefox-debuginfo
Red Hat:rhel_eus_long_life:8.4::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_4
0:140.10.0-1.el8_4
firefox-debugsource
Red Hat:rhel_eus_long_life:8.4::appstream
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_4
0:140.10.0-1.el8_4
firefox
Red Hat:rhel_els:7
From an advisory covering 25 CVEs
 before 0:140.10.0-2.el7_9
0:140.10.0-2.el7_9
firefox-debuginfo
Red Hat:rhel_els:7
From an advisory covering 25 CVEs
 before 0:140.10.0-2.el7_9
0:140.10.0-2.el7_9
firefox
Rocky Linux:9
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_7
0:140.10.0-1.el9_7
firefox
Rocky Linux:8
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_10
0:140.10.0-1.el8_10
firefox
Rocky Linux:10
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el10_1
0:140.10.0-1.el10_1
thunderbird
Rocky Linux:10
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el10_1
0:140.10.0-1.el10_1
thunderbird
Rocky Linux:8
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el8_10
0:140.10.0-1.el8_10
thunderbird
Rocky Linux:9
From an advisory covering 25 CVEs
 before 0:140.10.0-1.el9_7
0:140.10.0-1.el9_7
thunderbird
Rocky Linux:9
From an advisory covering 29 CVEs
 before 0:140.10.1-1.el9_8
0:140.10.1-1.el9_8
mozjs52
Ubuntu:18.04:LTS
 All versions, plus listed versions
52.3.1-0ubuntu352.3.1-7fakesync152.8.1-0ubuntu0.18.04.152.9.1-0ubuntu0.18.04.1
 None known
mozjs38
Ubuntu:18.04:LTS
 All versions, plus listed versions
38.8.0~repack1-0ubuntu138.8.0~repack1-0ubuntu338.8.0~repack1-0ubuntu4
 None known
mozjs68
Ubuntu:20.04:LTS
 All versions, plus listed versions
68.5.0-1~fakesync68.5.0-2~fakesync68.6.0-168.6.0-1ubuntu1
 None known
mozjs52
Ubuntu:20.04:LTS
 All versions, plus listed versions
52.9.1-1build152.9.1-1ubuntu3
 None known
mozjs102
Ubuntu:22.04:LTS
 All versions, plus listed versions
102.11.0-0ubuntu0.22.04.1102.12.0-0ubuntu0.22.04.1102.13.0-0ubuntu0.22.04.1102.15.1-0ubuntu0.22.04.1
 None known
mozjs78
Ubuntu:22.04:LTS
 All versions, plus listed versions
78.13.0-178.15.0-278.15.0-4ubuntu1
 None known
mozjs91
Ubuntu:22.04:LTS
 All versions, plus listed versions
91.5.1-0ubuntu191.6.0-191.6.0-291.7.0-291.10.0-0ubuntu1
 None known
thunderbird
Ubuntu:22.04:LTS
 All versions, plus listed versions
1:91.1.2+build1-0ubuntu11:91.3.0+build2-0ubuntu11:91.3.1+build1-0ubuntu11:91.3.2+build1-0ubuntu11:91.4.0+build1.1-0ubuntu1
Show 34 moreShow less
1:91.4.0+build2-0ubuntu11:91.5.0+build1-0ubuntu11:91.5.1+build1-0ubuntu11:91.6.1+build1-0ubuntu11:91.7.0+build1-0ubuntu11:91.7.0+build2-0ubuntu11:91.8.0+build2-0ubuntu11:91.9.1+build1-0ubuntu0.22.04.11:91.11.0+build2-0ubuntu0.22.04.11:102.2.2+build1-0ubuntu0.22.04.11:102.4.2+build2-0ubuntu0.22.04.11:102.7.1+build2-0ubuntu0.22.04.11:102.8.0+build2-0ubuntu0.22.04.11:102.9.0+build1-0ubuntu0.22.04.11:102.10.0+build2-0ubuntu0.22.04.11:102.11.0+build1-0ubuntu0.22.04.11:102.13.0+build1-0ubuntu0.22.04.11:102.15.0+build1-0ubuntu0.22.04.11:102.15.1+build1-0ubuntu0.22.04.11:115.3.1+build1-0ubuntu0.22.04.21:115.4.1+build1-0ubuntu0.22.04.11:115.5.0+build1-0ubuntu0.22.04.11:115.6.0+build2-0ubuntu0.22.04.11:115.8.1+build1-0ubuntu0.22.04.11:115.9.0+build1-0ubuntu0.22.04.11:115.10.1+build1-0ubuntu0.22.04.11:115.11.0+build2-0ubuntu0.22.04.11:115.12.0+build3-0ubuntu0.22.04.11:115.13.0+build5-0ubuntu0.22.04.11:115.15.0+build1-0ubuntu0.22.04.11:115.16.0+build2-0ubuntu0.22.04.11:115.18.0+build1-0ubuntu0.22.04.11:128.12.0+build1-0ubuntu0.22.04.11:140.7.1+build1-0ubuntu0.22.04.1
 None known
mozjs102
Ubuntu:24.04:LTS
 All versions, plus listed versions
102.15.1-1102.15.1-3ubuntu2
 None known
mozjs115
Ubuntu:24.04:LTS
 All versions, plus listed versions
115.3.0-0ubuntu1115.4.0-2115.5.0-1115.6.0-1115.7.0-4
Show 4 moreShow less
115.8.0-1115.9.0-1115.9.0-1build1115.10.0-1
 None known
MozillaThunderbird
openSUSE:Tumbleweed
From an advisory covering 25 CVEs
 before 140.9.1-1.1
140.9.1-1.1
MozillaFirefox
openSUSE:Tumbleweed
From an advisory covering 41 CVEs
 before 150.0-1.1
150.0-1.1
firefox-esr
openSUSE:Tumbleweed
From an advisory covering 228 CVEs
 before 153.0-1.1
153.0-1.1

History

History
RecordedChangedSources
referencesOSV
affected, facts
affected
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-6766 is a high vulnerability (CVSS 7.5) in Mozilla Firefox, published April 21, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.26%, the 17th percentile. Fixed in firefox-esr 140.10.0esr-1~deb12u1.

References

Show 194 moreShow less
This page doesn't list everything

Left out here: 280 versions, 333 references and the rest of 5 source descriptions. The JSON record has them. Left out on purpose, here and in the API, to keep responses small: 12 source records.

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