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CVE-2026-8391

Other issue in the JavaScript Engine component

5.3 MediumFix available

Other issue in the JavaScript Engine component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, Firefox ESR 140.11, and Thunderbird 140.11.

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
Low
Integrity
None
Availability
None

Exploit likelihood

0.30%Up 0.3 points since May 13, 2026
90%50%10%1%

What each source reports

CVE List Score used 5.3

Other issue in the JavaScript Engine component

Other issue in the JavaScript Engine component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, Firefox ESR 140.11, and Thunderbird 140.11.

Record
CVE-2026-8391
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness
CWE-20, CWE-79, CWE-119, CWE-475
Updated
2026-11-02
EUVDEUVD-2026-29466 7.5

Other issue in the JavaScript Engine component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, Firefox ESR 140.11, and Thunderbird 140.11.

Record
EUVD-2026-29466
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
GitHub AdvisoriesGHSA-93pv-vhrf-wv64 5.3

Other issue in the JavaScript Engine component. This vulnerability was fixed in Firefox 150.0.3.

Other issue in the JavaScript Engine component. This vulnerability was fixed in Firefox 150.0.3.

Record
GHSA-93pv-vhrf-wv64
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness
CWE-20, CWE-475
Updated
2026-11-02
NVD 5.3

Other issue in the JavaScript Engine component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, Firefox ESR 140.11, and Thunderbird 140.11.

Record
CVE-2026-8391
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness
CWE-20, CWE-79, CWE-119, CWE-475
Updated
2026-11-02
OSVDEBIAN-CVE-2026-8391 5.3

Other issue in the JavaScript Engine component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, Firefox ESR 140.11, and Thunderbird 140.11.

Record
DEBIAN-CVE-2026-8391
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Updated
2026-11-02
OSVOESA-2026-2392 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):

A critical vulnerability has been discovered in Mozilla Firefox browser versions up to 150.0.2, classified as CWE-119 buffer error. The vulnerability allows the product to read from or write to memory locations outside the intended boundary of the buffer when performing operations on a memory buffer. This vulnerability affects confidentiality, integrity, and availability. Upgrading to version 150.0.3 eliminates this vulnerability.(CVE-2026-8388)

A vulnerability was found in Mozilla Firefox up to 150.0.2 (Web Browser). It has been declared as critical. As an impact it is known to affect confidentiality, integrity, and availability. Upgrading to version 150.0.3 eliminates this vulnerability.(CVE-2026-8391)

A sandbox escape vulnerability exists in the Profile Backup component of Mozilla Firefox. This vulnerability affects Firefox versions up to 150.0.2 and was fixed in version 150.0.3. An attacker could potentially exploit this vulnerability to bypass sandbox protections, impacting the confidentiality, integrity, and availability of the system.(CVE-2026-8401)

Incorrect boundary conditions in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, and Firefox ESR 140.11.(CVE-2026-8946)

Use-after-free in the DOM: Bindings (WebIDL) component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, and Firefox ESR 140.11.(CVE-2026-8947)

Integer overflow in the Widget: Win32 component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8949)

Same-origin policy bypass in the Networking: HTTP component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8950)

Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, and Firefox ESR 140.11.(CVE-2026-8953)

Incorrect boundary conditions, integer overflow in the Audio/Video component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8954)

Privilege escalation in the DOM: Workers component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8955)

Integer overflow in the Networking: JAR component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8956)

Privilege escalation in the Enterprise Policies component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8957)

Information disclosure, sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8958)

Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8959)

Spoofing issue in the Form Autofill component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.(CVE-2026-8961)

Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.(CVE-2026-8962)

Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8968)

Privilege escalation in the Security component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8970) …

Record
OESA-2026-2392
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-2026-2393 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):

A critical vulnerability has been discovered in Mozilla Firefox browser versions up to 150.0.2, classified as CWE-119 buffer error. The vulnerability allows the product to read from or write to memory locations outside the intended boundary of the buffer when performing operations on a memory buffer. This vulnerability affects confidentiality, integrity, and availability. Upgrading to version 150.0.3 eliminates this vulnerability.(CVE-2026-8388)

A vulnerability was found in Mozilla Firefox up to 150.0.2 (Web Browser). It has been declared as critical. As an impact it is known to affect confidentiality, integrity, and availability. Upgrading to version 150.0.3 eliminates this vulnerability.(CVE-2026-8391)

A sandbox escape vulnerability exists in the Profile Backup component of Mozilla Firefox. This vulnerability affects Firefox versions up to 150.0.2 and was fixed in version 150.0.3. An attacker could potentially exploit this vulnerability to bypass sandbox protections, impacting the confidentiality, integrity, and availability of the system.(CVE-2026-8401)

Incorrect boundary conditions in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, and Firefox ESR 140.11.(CVE-2026-8946)

Use-after-free in the DOM: Bindings (WebIDL) component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, and Firefox ESR 140.11.(CVE-2026-8947)

Integer overflow in the Widget: Win32 component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8949)

Same-origin policy bypass in the Networking: HTTP component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8950)

Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, and Firefox ESR 140.11.(CVE-2026-8953)

Incorrect boundary conditions, integer overflow in the Audio/Video component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8954)

Privilege escalation in the DOM: Workers component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8955)

Integer overflow in the Networking: JAR component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8956)

Privilege escalation in the Enterprise Policies component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8957)

Information disclosure, sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8958)

Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8959)

Spoofing issue in the Form Autofill component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.(CVE-2026-8961)

Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.(CVE-2026-8962)

Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8968)

Privilege escalation in the Security component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8970) …

Record
OESA-2026-2393
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-2026-2394 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):

A critical vulnerability has been discovered in Mozilla Firefox browser versions up to 150.0.2, classified as CWE-119 buffer error. The vulnerability allows the product to read from or write to memory locations outside the intended boundary of the buffer when performing operations on a memory buffer. This vulnerability affects confidentiality, integrity, and availability. Upgrading to version 150.0.3 eliminates this vulnerability.(CVE-2026-8388)

A vulnerability was found in Mozilla Firefox up to 150.0.2 (Web Browser). It has been declared as critical. As an impact it is known to affect confidentiality, integrity, and availability. Upgrading to version 150.0.3 eliminates this vulnerability.(CVE-2026-8391)

A sandbox escape vulnerability exists in the Profile Backup component of Mozilla Firefox. This vulnerability affects Firefox versions up to 150.0.2 and was fixed in version 150.0.3. An attacker could potentially exploit this vulnerability to bypass sandbox protections, impacting the confidentiality, integrity, and availability of the system.(CVE-2026-8401)

Incorrect boundary conditions in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, and Firefox ESR 140.11.(CVE-2026-8946)

Use-after-free in the DOM: Bindings (WebIDL) component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, and Firefox ESR 140.11.(CVE-2026-8947)

Integer overflow in the Widget: Win32 component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8949)

Same-origin policy bypass in the Networking: HTTP component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8950)

Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, and Firefox ESR 140.11.(CVE-2026-8953)

Incorrect boundary conditions, integer overflow in the Audio/Video component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8954)

Privilege escalation in the DOM: Workers component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8955)

Integer overflow in the Networking: JAR component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8956)

Privilege escalation in the Enterprise Policies component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8957)

Information disclosure, sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8958)

Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8959)

Spoofing issue in the Form Autofill component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.(CVE-2026-8961)

Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.(CVE-2026-8962)

Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8968)

Privilege escalation in the Security component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8970) …

Record
OESA-2026-2394
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-2026-2465 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):

A critical vulnerability has been discovered in Mozilla Firefox browser versions up to 150.0.2, classified as CWE-119 buffer error. The vulnerability allows the product to read from or write to memory locations outside the intended boundary of the buffer when performing operations on a memory buffer. This vulnerability affects confidentiality, integrity, and availability. Upgrading to version 150.0.3 eliminates this vulnerability.(CVE-2026-8388)

A vulnerability was found in Mozilla Firefox up to 150.0.2 (Web Browser). It has been declared as critical. As an impact it is known to affect confidentiality, integrity, and availability. Upgrading to version 150.0.3 eliminates this vulnerability.(CVE-2026-8391)

A sandbox escape vulnerability exists in the Profile Backup component of Mozilla Firefox. This vulnerability affects Firefox versions up to 150.0.2 and was fixed in version 150.0.3. An attacker could potentially exploit this vulnerability to bypass sandbox protections, impacting the confidentiality, integrity, and availability of the system.(CVE-2026-8401)

Incorrect boundary conditions in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, and Firefox ESR 140.11.(CVE-2026-8946)

Use-after-free in the DOM: Bindings (WebIDL) component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, and Firefox ESR 140.11.(CVE-2026-8947)

Integer overflow in the Widget: Win32 component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8949)

Same-origin policy bypass in the Networking: HTTP component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8950)

Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, and Firefox ESR 140.11.(CVE-2026-8953)

Incorrect boundary conditions, integer overflow in the Audio/Video component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8954)

Privilege escalation in the DOM: Workers component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8955)

Integer overflow in the Networking: JAR component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8956)

Privilege escalation in the Enterprise Policies component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8957)

Information disclosure, sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8958)

Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8959)

Spoofing issue in the Form Autofill component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.(CVE-2026-8961)

Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.(CVE-2026-8962)

Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8968)

Privilege escalation in the Security component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8970) …

Record
OESA-2026-2465
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-2026-2756 9.8

thunderbird security update

Mozilla Thunderbird is a standalone mail and newsgroup client.

Security Fix(es):

Privilege escalation in the Graphics: WebRender component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.(CVE-2026-12289)

Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.(CVE-2026-12290)

Use-after-free in the Networking: HTTP component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.(CVE-2026-12291)

Incorrect boundary conditions in the Web Audio component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.(CVE-2026-12292)

Sandbox escape in the DOM: Workers component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.(CVE-2026-12294)

Sandbox escape in the DOM: Navigation component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.(CVE-2026-12295)

Sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.(CVE-2026-12296)

Sandbox escape due to incorrect boundary conditions in the Networking component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.(CVE-2026-12297)

Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.(CVE-2026-12298)

JIT miscompilation in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.(CVE-2026-12299)

Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.(CVE-2026-12302)

Same-origin policy bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.(CVE-2026-12304)

Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.(CVE-2026-12305)

Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.(CVE-2026-12306)

Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.(CVE-2026-12307)

Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.(CVE-2026-12308)

Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.(CVE-2026-12309)

Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.(CVE-2026-12310)

Information disclosure, sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.(CVE-2026-12311)

Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.(CVE-2026-12312)

Information disclosure, sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.(CVE-2026-12313)

Memory safety bug fixed in Firefox 152. This vulnerability was…

Record
OESA-2026-2756
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
OSVRHSA-2026:21378 7.5

Red Hat Security Advisory: firefox security update

Record
RHSA-2026:21378
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-2026:21380 7.5

Red Hat Security Advisory: firefox security update

Record
RHSA-2026:21380
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-2026:21381 7.5

Red Hat Security Advisory: thunderbird security update

Record
RHSA-2026:21381
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-2026:21382 7.5

Red Hat Security Advisory: firefox security update

Record
RHSA-2026:21382
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-2026:22325 7.5

Red Hat Security Advisory: thunderbird security update

Record
RHSA-2026:22325
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-2026:22643 7.5

Red Hat Security Advisory: thunderbird security update

Record
RHSA-2026:22643
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-2026:26174 7.5

Red Hat Security Advisory: thunderbird security update

Record
RHSA-2026:26174
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-2026:26268 7.5

Red Hat Security Advisory: thunderbird security update

Record
RHSA-2026:26268
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-2026:26269 7.5

Red Hat Security Advisory: thunderbird security update

Record
RHSA-2026:26269
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-2026:26270 7.5

Red Hat Security Advisory: thunderbird security update

Record
RHSA-2026:26270
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-2026:26491 7.5

Red Hat Security Advisory: firefox security update

Record
RHSA-2026:26491
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-2026:26492 7.5

Red Hat Security Advisory: firefox security update

Record
RHSA-2026:26492
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-2026:26493 7.5

Red Hat Security Advisory: firefox security update

Record
RHSA-2026:26493
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-2026:26521 7.5

Red Hat Security Advisory: thunderbird security update

Record
RHSA-2026:26521
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-2026:26536 7.5

Red Hat Security Advisory: thunderbird security update

Record
RHSA-2026:26536
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-2026:26539 7.5

Red Hat Security Advisory: thunderbird security update

Record
RHSA-2026:26539
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-2026:26551 7.5

Red Hat Security Advisory: firefox security update

Record
RHSA-2026:26551
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-2026:26606 7.5

Red Hat Security Advisory: firefox security update

Record
RHSA-2026:26606
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-2026:26629 7.5

Red Hat Security Advisory: firefox security update

Record
RHSA-2026:26629
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-2026:26630 7.5

Red Hat Security Advisory: firefox security update

Record
RHSA-2026:26630
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-2026:27715 7.5

Red Hat Security Advisory: firefox security update

Record
RHSA-2026:27715
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-2026:21378 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: Incorrect boundary conditions in the JavaScript Engine: JIT component (CVE-2026-8388)

  • firefox: Other issue in the JavaScript Engine component (CVE-2026-8391)

  • firefox: Sandbox escape in the Profile Backup component (CVE-2026-8401)

  • firefox: Integer overflow in the Networking: JAR component (CVE-2026-8956)

  • firefox: Memory safety bugs fixed in Firefox ESR 115.36, Firefox ESR 140.11 and Firefox 151 (CVE-2026-8975)

  • firefox: Privilege escalation in the DOM: Workers component (CVE-2026-8955)

  • firefox: Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component (CVE-2026-8968)

  • firefox: Incorrect boundary conditions, integer overflow in the Audio/Video component (CVE-2026-8954)

  • firefox: Information disclosure, sandbox escape in the Security: Process Sandboxing component (CVE-2026-8958)

  • firefox: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-8946)

  • firefox: Privilege escalation in the Security component (CVE-2026-8970)

  • firefox: Same-origin policy bypass in the Networking: HTTP component (CVE-2026-8950)

  • firefox: Memory safety bugs fixed in Firefox ESR 140.11 and Firefox 151 (CVE-2026-8974)

  • firefox: Sandbox escape due to use-after-free in the Disability Access APIs component (CVE-2026-8953)

  • firefox: Spoofing issue in the Form Autofill component (CVE-2026-8961)

  • firefox: Use-after-free in the DOM: Bindings (WebIDL) component (CVE-2026-8947)

  • firefox: Mitigation bypass in the DOM: Security component (CVE-2026-8962)

  • firefox: Privilege escalation in the Enterprise Policies component (CVE-2026-8957)

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-2026:21378
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-2026:21380 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: Incorrect boundary conditions in the JavaScript Engine: JIT component (CVE-2026-8388)

  • firefox: Other issue in the JavaScript Engine component (CVE-2026-8391)

  • firefox: Sandbox escape in the Profile Backup component (CVE-2026-8401)

  • firefox: Integer overflow in the Networking: JAR component (CVE-2026-8956)

  • firefox: Memory safety bugs fixed in Firefox ESR 115.36, Firefox ESR 140.11 and Firefox 151 (CVE-2026-8975)

  • firefox: Privilege escalation in the DOM: Workers component (CVE-2026-8955)

  • firefox: Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component (CVE-2026-8968)

  • firefox: Incorrect boundary conditions, integer overflow in the Audio/Video component (CVE-2026-8954)

  • firefox: Information disclosure, sandbox escape in the Security: Process Sandboxing component (CVE-2026-8958)

  • firefox: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-8946)

  • firefox: Privilege escalation in the Security component (CVE-2026-8970)

  • firefox: Same-origin policy bypass in the Networking: HTTP component (CVE-2026-8950)

  • firefox: Memory safety bugs fixed in Firefox ESR 140.11 and Firefox 151 (CVE-2026-8974)

  • firefox: Sandbox escape due to use-after-free in the Disability Access APIs component (CVE-2026-8953)

  • firefox: Spoofing issue in the Form Autofill component (CVE-2026-8961)

  • firefox: Use-after-free in the DOM: Bindings (WebIDL) component (CVE-2026-8947)

  • firefox: Mitigation bypass in the DOM: Security component (CVE-2026-8962)

  • firefox: Privilege escalation in the Enterprise Policies component (CVE-2026-8957)

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-2026:21380
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-2026:21381 7.5

Important: thunderbird security update

Mozilla Thunderbird is a standalone mail and newsgroup client.

Security Fix(es):

  • firefox: Incorrect boundary conditions in the JavaScript Engine: JIT component (CVE-2026-8388)

  • firefox: Other issue in the JavaScript Engine component (CVE-2026-8391)

  • firefox: Sandbox escape in the Profile Backup component (CVE-2026-8401)

  • firefox: Integer overflow in the Networking: JAR component (CVE-2026-8956)

  • firefox: Memory safety bugs fixed in Firefox ESR 115.36, Firefox ESR 140.11 and Firefox 151 (CVE-2026-8975)

  • firefox: Privilege escalation in the DOM: Workers component (CVE-2026-8955)

  • firefox: Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component (CVE-2026-8968)

  • firefox: Incorrect boundary conditions, integer overflow in the Audio/Video component (CVE-2026-8954)

  • firefox: Information disclosure, sandbox escape in the Security: Process Sandboxing component (CVE-2026-8958)

  • firefox: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-8946)

  • firefox: Privilege escalation in the Security component (CVE-2026-8970)

  • firefox: Same-origin policy bypass in the Networking: HTTP component (CVE-2026-8950)

  • firefox: Memory safety bugs fixed in Firefox ESR 140.11 and Firefox 151 (CVE-2026-8974)

  • firefox: Sandbox escape due to use-after-free in the Disability Access APIs component (CVE-2026-8953)

  • firefox: Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component (CVE-2026-8959)

  • firefox: Spoofing issue in the Form Autofill component (CVE-2026-8961)

  • firefox: Use-after-free in the DOM: Bindings (WebIDL) component (CVE-2026-8947)

  • firefox: Mitigation bypass in the DOM: Security component (CVE-2026-8962)

  • firefox: Privilege escalation in the Enterprise Policies component (CVE-2026-8957)

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-2026:21381
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-2026:21382 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: Incorrect boundary conditions in the JavaScript Engine: JIT component (CVE-2026-8388)

  • firefox: Other issue in the JavaScript Engine component (CVE-2026-8391)

  • firefox: Sandbox escape in the Profile Backup component (CVE-2026-8401)

  • firefox: Integer overflow in the Networking: JAR component (CVE-2026-8956)

  • firefox: Memory safety bugs fixed in Firefox ESR 115.36, Firefox ESR 140.11 and Firefox 151 (CVE-2026-8975)

  • firefox: Privilege escalation in the DOM: Workers component (CVE-2026-8955)

  • firefox: Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component (CVE-2026-8968)

  • firefox: Incorrect boundary conditions, integer overflow in the Audio/Video component (CVE-2026-8954)

  • firefox: Information disclosure, sandbox escape in the Security: Process Sandboxing component (CVE-2026-8958)

  • firefox: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-8946)

  • firefox: Privilege escalation in the Security component (CVE-2026-8970)

  • firefox: Same-origin policy bypass in the Networking: HTTP component (CVE-2026-8950)

  • firefox: Memory safety bugs fixed in Firefox ESR 140.11 and Firefox 151 (CVE-2026-8974)

  • firefox: Sandbox escape due to use-after-free in the Disability Access APIs component (CVE-2026-8953)

  • firefox: Spoofing issue in the Form Autofill component (CVE-2026-8961)

  • firefox: Use-after-free in the DOM: Bindings (WebIDL) component (CVE-2026-8947)

  • firefox: Mitigation bypass in the DOM: Security component (CVE-2026-8962)

  • firefox: Privilege escalation in the Enterprise Policies component (CVE-2026-8957)

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-2026:21382
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-2026:22325 7.5

Important: thunderbird security update

Mozilla Thunderbird is a standalone mail and newsgroup client.

Security Fix(es):

  • firefox: Incorrect boundary conditions in the JavaScript Engine: JIT component (CVE-2026-8388)

  • firefox: Other issue in the JavaScript Engine component (CVE-2026-8391)

  • firefox: Sandbox escape in the Profile Backup component (CVE-2026-8401)

  • firefox: Integer overflow in the Networking: JAR component (CVE-2026-8956)

  • firefox: Memory safety bugs fixed in Firefox ESR 115.36, Firefox ESR 140.11 and Firefox 151 (CVE-2026-8975)

  • firefox: Privilege escalation in the DOM: Workers component (CVE-2026-8955)

  • firefox: Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component (CVE-2026-8968)

  • firefox: Incorrect boundary conditions, integer overflow in the Audio/Video component (CVE-2026-8954)

  • firefox: Information disclosure, sandbox escape in the Security: Process Sandboxing component (CVE-2026-8958)

  • firefox: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-8946)

  • firefox: Privilege escalation in the Security component (CVE-2026-8970)

  • firefox: Same-origin policy bypass in the Networking: HTTP component (CVE-2026-8950)

  • firefox: Memory safety bugs fixed in Firefox ESR 140.11 and Firefox 151 (CVE-2026-8974)

  • firefox: Sandbox escape due to use-after-free in the Disability Access APIs component (CVE-2026-8953)

  • firefox: Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component (CVE-2026-8959)

  • firefox: Spoofing issue in the Form Autofill component (CVE-2026-8961)

  • firefox: Use-after-free in the DOM: Bindings (WebIDL) component (CVE-2026-8947)

  • firefox: Mitigation bypass in the DOM: Security component (CVE-2026-8962)

  • firefox: Privilege escalation in the Enterprise Policies component (CVE-2026-8957)

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-2026:22325
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-2026:22643 7.5

Important: thunderbird security update

Mozilla Thunderbird is a standalone mail and newsgroup client.

Security Fix(es):

  • firefox: Incorrect boundary conditions in the JavaScript Engine: JIT component (CVE-2026-8388)

  • firefox: Other issue in the JavaScript Engine component (CVE-2026-8391)

  • firefox: Sandbox escape in the Profile Backup component (CVE-2026-8401)

  • firefox: Integer overflow in the Networking: JAR component (CVE-2026-8956)

  • firefox: Memory safety bugs fixed in Firefox ESR 115.36, Firefox ESR 140.11 and Firefox 151 (CVE-2026-8975)

  • firefox: Privilege escalation in the DOM: Workers component (CVE-2026-8955)

  • firefox: Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component (CVE-2026-8968)

  • firefox: Incorrect boundary conditions, integer overflow in the Audio/Video component (CVE-2026-8954)

  • firefox: Information disclosure, sandbox escape in the Security: Process Sandboxing component (CVE-2026-8958)

  • firefox: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-8946)

  • firefox: Privilege escalation in the Security component (CVE-2026-8970)

  • firefox: Same-origin policy bypass in the Networking: HTTP component (CVE-2026-8950)

  • firefox: Memory safety bugs fixed in Firefox ESR 140.11 and Firefox 151 (CVE-2026-8974)

  • firefox: Sandbox escape due to use-after-free in the Disability Access APIs component (CVE-2026-8953)

  • firefox: Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component (CVE-2026-8959)

  • firefox: Spoofing issue in the Form Autofill component (CVE-2026-8961)

  • firefox: Use-after-free in the DOM: Bindings (WebIDL) component (CVE-2026-8947)

  • firefox: Mitigation bypass in the DOM: Security component (CVE-2026-8962)

  • firefox: Privilege escalation in the Enterprise Policies component (CVE-2026-8957)

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-2026:22643
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
OSVUBUNTU-CVE-2026-8391 5.3

Other issue in the JavaScript Engine component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, Firefox ESR 140.11, and Thunderbird 140.11.

Record
UBUNTU-CVE-2026-8391
CVSS 3.1
5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
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
OSVALSA-2026:21378 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: Incorrect boundary conditions in the JavaScript Engine: JIT component (CVE-2026-8388)
  • firefox: Other issue in the JavaScript Engine component (CVE-2026-8391)
  • firefox: Sandbox escape in the Profile Backup component (CVE-2026-8401)
  • firefox: Integer overflow in the Networking: JAR component (CVE-2026-8956)
  • firefox: Memory safety bugs fixed in Firefox ESR 115.36, Firefox ESR 140.11 and Firefox 151 (CVE-2026-8975)
  • firefox: Privilege escalation in the DOM: Workers component (CVE-2026-8955)
  • firefox: Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component (CVE-2026-8968)
  • firefox: Incorrect boundary conditions, integer overflow in the Audio/Video component (CVE-2026-8954)
  • firefox: Information disclosure, sandbox escape in the Security: Process Sandboxing component (CVE-2026-8958)
  • firefox: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-8946)
  • firefox: Privilege escalation in the Security component (CVE-2026-8970)
  • firefox: Same-origin policy bypass in the Networking: HTTP component (CVE-2026-8950)
  • firefox: Memory safety bugs fixed in Firefox ESR 140.11 and Firefox 151 (CVE-2026-8974)
  • firefox: Sandbox escape due to use-after-free in the Disability Access APIs component (CVE-2026-8953)
  • firefox: Spoofing issue in the Form Autofill component (CVE-2026-8961)
  • firefox: Use-after-free in the DOM: Bindings (WebIDL) component (CVE-2026-8947)
  • firefox: Mitigation bypass in the DOM: Security component (CVE-2026-8962)
  • firefox: Privilege escalation in the Enterprise Policies component (CVE-2026-8957)

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-2026:21378
Updated
2026-11-02
OSVALSA-2026:21380 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: Incorrect boundary conditions in the JavaScript Engine: JIT component (CVE-2026-8388)
  • firefox: Other issue in the JavaScript Engine component (CVE-2026-8391)
  • firefox: Sandbox escape in the Profile Backup component (CVE-2026-8401)
  • firefox: Integer overflow in the Networking: JAR component (CVE-2026-8956)
  • firefox: Memory safety bugs fixed in Firefox ESR 115.36, Firefox ESR 140.11 and Firefox 151 (CVE-2026-8975)
  • firefox: Privilege escalation in the DOM: Workers component (CVE-2026-8955)
  • firefox: Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component (CVE-2026-8968)
  • firefox: Incorrect boundary conditions, integer overflow in the Audio/Video component (CVE-2026-8954)
  • firefox: Information disclosure, sandbox escape in the Security: Process Sandboxing component (CVE-2026-8958)
  • firefox: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-8946)
  • firefox: Privilege escalation in the Security component (CVE-2026-8970)
  • firefox: Same-origin policy bypass in the Networking: HTTP component (CVE-2026-8950)
  • firefox: Memory safety bugs fixed in Firefox ESR 140.11 and Firefox 151 (CVE-2026-8974)
  • firefox: Sandbox escape due to use-after-free in the Disability Access APIs component (CVE-2026-8953)
  • firefox: Spoofing issue in the Form Autofill component (CVE-2026-8961)
  • firefox: Use-after-free in the DOM: Bindings (WebIDL) component (CVE-2026-8947)
  • firefox: Mitigation bypass in the DOM: Security component (CVE-2026-8962)
  • firefox: Privilege escalation in the Enterprise Policies component (CVE-2026-8957)

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-2026:21380
Updated
2026-11-02
OSVALSA-2026:21381 No score

Important: thunderbird security update

Mozilla Thunderbird is a standalone mail and newsgroup client.

Security Fix(es):

  • firefox: Incorrect boundary conditions in the JavaScript Engine: JIT component (CVE-2026-8388)
  • firefox: Other issue in the JavaScript Engine component (CVE-2026-8391)
  • firefox: Sandbox escape in the Profile Backup component (CVE-2026-8401)
  • firefox: Integer overflow in the Networking: JAR component (CVE-2026-8956)
  • firefox: Memory safety bugs fixed in Firefox ESR 115.36, Firefox ESR 140.11 and Firefox 151 (CVE-2026-8975)
  • firefox: Privilege escalation in the DOM: Workers component (CVE-2026-8955)
  • firefox: Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component (CVE-2026-8968)
  • firefox: Incorrect boundary conditions, integer overflow in the Audio/Video component (CVE-2026-8954)
  • firefox: Information disclosure, sandbox escape in the Security: Process Sandboxing component (CVE-2026-8958)
  • firefox: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-8946)
  • firefox: Privilege escalation in the Security component (CVE-2026-8970)
  • firefox: Same-origin policy bypass in the Networking: HTTP component (CVE-2026-8950)
  • firefox: Memory safety bugs fixed in Firefox ESR 140.11 and Firefox 151 (CVE-2026-8974)
  • firefox: Sandbox escape due to use-after-free in the Disability Access APIs component (CVE-2026-8953)
  • firefox: Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component (CVE-2026-8959)
  • firefox: Spoofing issue in the Form Autofill component (CVE-2026-8961)
  • firefox: Use-after-free in the DOM: Bindings (WebIDL) component (CVE-2026-8947)
  • firefox: Mitigation bypass in the DOM: Security component (CVE-2026-8962)
  • firefox: Privilege escalation in the Enterprise Policies component (CVE-2026-8957)

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-2026:21381
Updated
2026-11-06
OSVALSA-2026:21382 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: Incorrect boundary conditions in the JavaScript Engine: JIT component (CVE-2026-8388)
  • firefox: Other issue in the JavaScript Engine component (CVE-2026-8391)
  • firefox: Sandbox escape in the Profile Backup component (CVE-2026-8401)
  • firefox: Integer overflow in the Networking: JAR component (CVE-2026-8956)
  • firefox: Memory safety bugs fixed in Firefox ESR 115.36, Firefox ESR 140.11 and Firefox 151 (CVE-2026-8975)
  • firefox: Privilege escalation in the DOM: Workers component (CVE-2026-8955)
  • firefox: Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component (CVE-2026-8968)
  • firefox: Incorrect boundary conditions, integer overflow in the Audio/Video component (CVE-2026-8954)
  • firefox: Information disclosure, sandbox escape in the Security: Process Sandboxing component (CVE-2026-8958)
  • firefox: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-8946)
  • firefox: Privilege escalation in the Security component (CVE-2026-8970)
  • firefox: Same-origin policy bypass in the Networking: HTTP component (CVE-2026-8950)
  • firefox: Memory safety bugs fixed in Firefox ESR 140.11 and Firefox 151 (CVE-2026-8974)
  • firefox: Sandbox escape due to use-after-free in the Disability Access APIs component (CVE-2026-8953)
  • firefox: Spoofing issue in the Form Autofill component (CVE-2026-8961)
  • firefox: Use-after-free in the DOM: Bindings (WebIDL) component (CVE-2026-8947)
  • firefox: Mitigation bypass in the DOM: Security component (CVE-2026-8962)
  • firefox: Privilege escalation in the Enterprise Policies component (CVE-2026-8957)

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-2026:21382
Updated
2026-11-02
OSVALSA-2026:22325 No score

Important: thunderbird security update

Mozilla Thunderbird is a standalone mail and newsgroup client.

Security Fix(es):

  • firefox: Incorrect boundary conditions in the JavaScript Engine: JIT component (CVE-2026-8388)
  • firefox: Other issue in the JavaScript Engine component (CVE-2026-8391)
  • firefox: Sandbox escape in the Profile Backup component (CVE-2026-8401)
  • firefox: Integer overflow in the Networking: JAR component (CVE-2026-8956)
  • firefox: Memory safety bugs fixed in Firefox ESR 115.36, Firefox ESR 140.11 and Firefox 151 (CVE-2026-8975)
  • firefox: Privilege escalation in the DOM: Workers component (CVE-2026-8955)
  • firefox: Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component (CVE-2026-8968)
  • firefox: Incorrect boundary conditions, integer overflow in the Audio/Video component (CVE-2026-8954)
  • firefox: Information disclosure, sandbox escape in the Security: Process Sandboxing component (CVE-2026-8958)
  • firefox: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-8946)
  • firefox: Privilege escalation in the Security component (CVE-2026-8970)
  • firefox: Same-origin policy bypass in the Networking: HTTP component (CVE-2026-8950)
  • firefox: Memory safety bugs fixed in Firefox ESR 140.11 and Firefox 151 (CVE-2026-8974)
  • firefox: Sandbox escape due to use-after-free in the Disability Access APIs component (CVE-2026-8953)
  • firefox: Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component (CVE-2026-8959)
  • firefox: Spoofing issue in the Form Autofill component (CVE-2026-8961)
  • firefox: Use-after-free in the DOM: Bindings (WebIDL) component (CVE-2026-8947)
  • firefox: Mitigation bypass in the DOM: Security component (CVE-2026-8962)
  • firefox: Privilege escalation in the Enterprise Policies component (CVE-2026-8957)

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-2026:22325
Updated
2026-11-06
OSVALSA-2026:22643 No score

Important: thunderbird security update

Mozilla Thunderbird is a standalone mail and newsgroup client.

Security Fix(es):

  • firefox: Incorrect boundary conditions in the JavaScript Engine: JIT component (CVE-2026-8388)
  • firefox: Other issue in the JavaScript Engine component (CVE-2026-8391)
  • firefox: Sandbox escape in the Profile Backup component (CVE-2026-8401)
  • firefox: Integer overflow in the Networking: JAR component (CVE-2026-8956)
  • firefox: Memory safety bugs fixed in Firefox ESR 115.36, Firefox ESR 140.11 and Firefox 151 (CVE-2026-8975)
  • firefox: Privilege escalation in the DOM: Workers component (CVE-2026-8955)
  • firefox: Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component (CVE-2026-8968)
  • firefox: Incorrect boundary conditions, integer overflow in the Audio/Video component (CVE-2026-8954)
  • firefox: Information disclosure, sandbox escape in the Security: Process Sandboxing component (CVE-2026-8958)
  • firefox: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-8946)
  • firefox: Privilege escalation in the Security component (CVE-2026-8970)
  • firefox: Same-origin policy bypass in the Networking: HTTP component (CVE-2026-8950)
  • firefox: Memory safety bugs fixed in Firefox ESR 140.11 and Firefox 151 (CVE-2026-8974)
  • firefox: Sandbox escape due to use-after-free in the Disability Access APIs component (CVE-2026-8953)
  • firefox: Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component (CVE-2026-8959)
  • firefox: Spoofing issue in the Form Autofill component (CVE-2026-8961)
  • firefox: Use-after-free in the DOM: Bindings (WebIDL) component (CVE-2026-8947)
  • firefox: Mitigation bypass in the DOM: Security component (CVE-2026-8962)
  • firefox: Privilege escalation in the Enterprise Policies component (CVE-2026-8957)

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-2026:22643
Updated
2026-11-06
OSVMGASA-2026-0164 No score

Updated thunderbird(-l10n) packages fix security vulnerabilities

The updated packages fix security vulnerabilities: Incorrect boundary conditions in the Audio/Video: Web Codecs component. (CVE-2026-8946) Incorrect boundary conditions in the JavaScript Engine: JIT component. (CVE-2026-8388) Use-after-free in the DOM: Bindings (WebIDL) component. (CVE-2026-8947) Other issue in the JavaScript Engine component. (CVE-2026-8391) Sandbox escape in the Profile Backup component. (CVE-2026-8401) Same-origin policy bypass in the Networking: HTTP component. (CVE-2026-8950) Sandbox escape due to use-after-free in the Disability Access APIs component. (CVE-2026-8953) Incorrect boundary conditions, integer overflow in the Audio/Video component. (CVE-2026-8954) Privilege escalation in the DOM: Workers component. (CVE-2026-8955) Integer overflow in the Networking: JAR component. (CVE-2026-8956) Privilege escalation in the Enterprise Policies component. (CVE-2026-8957) Information disclosure, sandbox escape in the Security: Process Sandboxing component. (CVE-2026-8958) Spoofing issue in the Form Autofill component. (CVE-2026-8961) Mitigation bypass in the DOM: Security component. (CVE-2026-8962) Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component. (CVE-2026-8968) Privilege escalation in the Security component. (CVE-2026-8970) Memory safety bugs fixed in Thunderbird 140.11 and Thunderbird 151. (CVE-2026-8974) Memory safety bugs fixed in Thunderbird 140.11 and Thunderbird 151. (CVE-2026-8975)

Record
MGASA-2026-0164
Updated
2026-11-02
OSVMGASA-2026-0165 No score

Updated nspr, nss and firefox(-l10n) packages fix security issues

The updated packages fix security vulnerabilities: Incorrect boundary conditions in the Audio/Video: Web Codecs component. (CVE-2026-8946) Incorrect boundary conditions in the JavaScript Engine: JIT component. (CVE-2026-8388) Use-after-free in the DOM: Bindings (WebIDL) component. (CVE-2026-8947) Other issue in the JavaScript Engine component. (CVE-2026-8391) Sandbox escape in the Profile Backup component. (CVE-2026-8401) Same-origin policy bypass in the Networking: HTTP component. (CVE-2026-8950) Sandbox escape due to use-after-free in the Disability Access APIs component. (CVE-2026-8953) Incorrect boundary conditions, integer overflow in the Audio/Video component. (CVE-2026-8954) Privilege escalation in the DOM: Workers component. (CVE-2026-8955) Integer overflow in the Networking: JAR component. (CVE-2026-8956) Privilege escalation in the Enterprise Policies component. (CVE-2026-8957) Information disclosure, sandbox escape in the Security: Process Sandboxing component. (CVE-2026-8958) Spoofing issue in the Form Autofill component. (CVE-2026-8961) Mitigation bypass in the DOM: Security component. (CVE-2026-8962) Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component. (CVE-2026-8968) Privilege escalation in the Security component. (CVE-2026-8970) Memory safety bugs fixed in Firefox ESR 140.11 and Firefox 151. (CVE-2026-8974) Memory safety bugs fixed in Firefox ESR 115.36, Firefox ESR 140.11 and Firefox 151. (CVE-2026-8975)

Record
MGASA-2026-0165
Updated
2026-11-02
OSVopenSUSE-SU-2026:10813-1 No score

firefox-esr-140.11.0-1.1 on GA media

These are all security issues fixed in the firefox-esr-140.11.0-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2026:10813-1
Updated
2026-11-02
OSVopenSUSE-SU-2026:10864-1 No score

MozillaThunderbird-140.11.1-1.1 on GA media

These are all security issues fixed in the MozillaThunderbird-140.11.1-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2026:10864-1
Updated
2026-11-02
OSVopenSUSE-SU-2026:20789-1 No score

Security update for MozillaFirefox

This update for MozillaFirefox fixes the following issues

  • Update to Firefox Extended Support Release 140.11.0 ESR MFSA 2026-48 (bsc#1265212).

MFSA 2026-48:

  • CVE-2026-8388: Incorrect boundary conditions in the JavaScript Engine: JIT component.
  • CVE-2026-8391: Other issue in the JavaScript Engine component.
  • CVE-2026-8401: Sandbox escape in the Profile Backup component.
  • CVE-2026-8946: Incorrect boundary conditions in the Audio/Video: Web Codecs component.
  • CVE-2026-8947: Use-after-free in the DOM: Bindings (WebIDL) component.
  • CVE-2026-8949: Integer overflow in the Widget: Win32 component.
  • CVE-2026-8950: Same-origin policy bypass in the Networking: HTTP component.
  • CVE-2026-8953: Sandbox escape due to use-after-free in the Disability Access APIs component.
  • CVE-2026-8954: Incorrect boundary conditions, integer overflow in the Audio/Video component.
  • CVE-2026-8955: Privilege escalation in the DOM: Workers component.
  • CVE-2026-8956: Integer overflow in the Networking: JAR component.
  • CVE-2026-8957: Privilege escalation in the Enterprise Policies component.
  • CVE-2026-8958: Information disclosure, sandbox escape in the Security: Process Sandboxing component.
  • CVE-2026-8959: Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component.
  • CVE-2026-8961: Spoofing issue in the Form Autofill component.
  • CVE-2026-8962: Mitigation bypass in the DOM: Security component.
  • CVE-2026-8968: Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component.
  • CVE-2026-8970: Privilege escalation in the Security component.
  • CVE-2026-8974: Memory safety bugs fixed in Firefox ESR 140.11 and Firefox 151.
  • CVE-2026-8975: Memory safety bugs fixed in Firefox ESR 115.36, Firefox ESR 140.11 and Firefox 151.
Record
openSUSE-SU-2026:20789-1
Updated
2026-11-02
OSVopenSUSE-SU-2026:21168-1 No score

Security update for MozillaThunderbird

This update for MozillaThunderbird fixes the following issues:

Changes in MozillaThunderbird:

  • Mozilla Thunderbird 140.12.0 ESR MFSA 2026-61 (bsc#1268071)

    • CVE-2026-12289 (bmo#2023443) Privilege escalation in the Graphics: WebRender component
    • CVE-2026-12290 (bmo#2024852) Memory safety bug fixed in Thunderbird ESR 140.12
    • CVE-2026-12291 (bmo#2036929) Use-after-free in the Networking: HTTP component
    • CVE-2026-12292 (bmo#2038465) Incorrect boundary conditions in the Web Audio component
    • CVE-2026-12294 (bmo#2039873) Sandbox escape in the DOM: Workers component
    • CVE-2026-12295 (bmo#2040160) Sandbox escape in the DOM: Navigation component
    • CVE-2026-12298 (bmo#2041981) Memory safety bug fixed in Thunderbird ESR 140.12
    • CVE-2026-12296 (bmo#2040515) Sandbox escape in the Security: Process Sandboxing component
    • CVE-2026-12297 (bmo#2041610) Sandbox escape due to incorrect boundary conditions in the Networking component
    • CVE-2026-12299 (bmo#2043139) JIT miscompilation in the DOM: Core & HTML component
    • CVE-2026-12329 (bmo#2044738) Memory safety bug fixed in Thunderbird ESR 140.12
    • CVE-2026-12302 (bmo#2034489) Mitigation bypass in the DOM: Security component
    • CVE-2026-12304 (bmo#2034944) Same-origin policy bypass in the Networking: Cookies component
    • CVE-2026-12305 (bmo#2037290) Memory safety bug fixed in Thunderbird ESR 140.12
    • CVE-2026-12306 (bmo#2037323) Memory safety bug fixed in Thunderbird ESR 140.12
    • CVE-2026-12307 (bmo#2038133) Memory safety bug fixed in Thunderbird ESR 140.12
    • CVE-2026-12308 (bmo#2038302) Memory safety bug fixed in Thunderbird ESR 140.12
    • CVE-2026-12309 (bmo#2038476) Memory safety bug fixed in Thunderbird ESR 140.12
    • CVE-2026-12310 (bmo#2039707) Memory safety bug fixed in Thunderbird ESR 140.12
    • CVE-2026-12311 (bmo#2040177) Information disclosure, sandbox escape in the Security: Process Sandboxing component
    • CVE-2026-12312 (bmo#2040383) Memory safety bug fixed in Thunderbird ESR 140.12
    • CVE-2026-12313 (bmo#2040477) Information disclosure, sandbox escape in the Security: Process Sandboxing component
    • CVE-2026-12314 (bmo#2041856) Memory safety bug fixed in Thunderbird ESR 140.12
    • CVE-2026-12315 (bmo#2042058) Mitigation bypass in the DOM: Security component
    • CVE-2026-12330 (bmo#2029326) Incorrect boundary conditions in the Internationalization component
    • CVE-2026-12324 (bmo#2038444) Incorrect boundary conditions in the Graphics: CanvasWebGL component
    • CVE-2026-12325 (bmo#2039443) Denial-of-service in the Graphics: ImageLib component
    • CVE-2026-12327 (bmo#2011842, bmo#2023902, bmo#2025512, bmo#2027312, bmo#2029444, bmo#2036571, bmo#2036900, bmo#2036936, bmo#2037995, bmo#2038551, bmo#2040717, bmo#2042724) Memory safety bugs fixed in Firefox ESR 140.12, Thunderbird ESR 140.12, Firefox 152 and Thunderbird 152
    • CVE-2026-12328 (bmo#2029402, bmo#2038477, bmo#2039726, bmo#2041373, bmo#2042268, bmo#2042451, bmo#2042782, bmo#2042858, bmo#2042929, bmo#2042965, bmo#2043213) Memory safety bugs fixed in Firefox ESR 115.37, Firefox ESR 140.12, Thunderbird ESR 140.12, Firefox 152 and Thunderbird 152

  • Mozilla Thunderbird 140.11.0 ESR MFSA 2026-51 (bsc#1265212)

    • CVE-2026-8946 (bmo#2029070) Incorrect boundary conditions in the Audio/Video: Web Codecs component
    • CVE-2026-8388 (bmo#2036978) Incorrect boundary conditions in the JavaScript Engine: JIT component
    • CVE-2026-8947 (bmo#2038439) Use-after-free in the DOM: Bindings (WebIDL) component
    • CVE-2026-8391 (bmo#2038575) Other issue in the JavaScript Engine component
    • CVE-2026-8401 (bmo#2038679) Sandbox escape in the Profile Backup component
    • CVE-2026-8949 (bmo#1355639) Integer overflow in the Widget: Win32 component
    • CVE-2026-8950 (bmo#1965430) Same-origin policy bypass in the…
Record
openSUSE-SU-2026:21168-1
Updated
2026-11-02
OSVSUSE-SU-2026:2039-1 No score

Security update for MozillaFirefox

This update for MozillaFirefox fixes the following issue

Update to Firefox Extended Support Release 140.11.0 ESR MFSA 2026-48 (bsc#1265212)

  • CVE-2026-8388: Incorrect boundary conditions in the JavaScript Engine: JIT component.
  • CVE-2026-8391: Other issue in the JavaScript Engine component.
  • CVE-2026-8401: Sandbox escape in the Profile Backup component.
  • CVE-2026-8946: Incorrect boundary conditions in the Audio/Video: Web Codecs component.
  • CVE-2026-8947: Use-after-free in the DOM: Bindings (WebIDL) component.
  • CVE-2026-8949: Integer overflow in the Widget: Win32 component.
  • CVE-2026-8950: Same-origin policy bypass in the Networking: HTTP component.
  • CVE-2026-8953: Sandbox escape due to use-after-free in the Disability Access APIs component.
  • CVE-2026-8954: Incorrect boundary conditions, integer overflow in the Audio/Video component.
  • CVE-2026-8955: Privilege escalation in the DOM: Workers component.
  • CVE-2026-8956: Integer overflow in the Networking: JAR component.
  • CVE-2026-8957: Privilege escalation in the Enterprise Policies component.
  • CVE-2026-8958: Information disclosure, sandbox escape in the Security: Process Sandboxing component.
  • CVE-2026-8959: Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component.
  • CVE-2026-8961: Spoofing issue in the Form Autofill component.
  • CVE-2026-8962: Mitigation bypass in the DOM: Security component.
  • CVE-2026-8968: Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component.
  • CVE-2026-8970: Privilege escalation in the Security component.
  • CVE-2026-8974: Memory safety bugs fixed in Firefox ESR 140.11 and Firefox 151.
  • CVE-2026-8975: Memory safety bugs fixed in Firefox ESR 115.36, Firefox ESR 140.11 and Firefox 151.
Record
SUSE-SU-2026:2039-1
Updated
2026-11-02
OSVSUSE-SU-2026:2109-1 No score

Security update for MozillaFirefox

This update for MozillaFirefox fixes the following issues

Update to Firefox Extended Support Release 140.11.0 ESR MFSA 2026-41, MFSA 2026-48 (bsc#1265212, bsc#1264378):

  • CVE-2026-8090: Use-after-free in the DOM: Networking component.
  • CVE-2026-8092: Memory safety bugs fixed in Firefox ESR 115.35.2, Firefox ESR 140.10.2 and Firefox 150.0.2.
  • CVE-2026-8094: Other issue in the WebRTC component.
  • CVE-2026-8388: Incorrect boundary conditions in the JavaScript Engine: JIT component.
  • CVE-2026-8391: Other issue in the JavaScript Engine component.
  • CVE-2026-8401: Sandbox escape in the Profile Backup component.
  • CVE-2026-8946: Incorrect boundary conditions in the Audio/Video: Web Codecs component.
  • CVE-2026-8947: Use-after-free in the DOM: Bindings (WebIDL) component.
  • CVE-2026-8949: Integer overflow in the Widget: Win32 component.
  • CVE-2026-8950: Same-origin policy bypass in the Networking: HTTP component.
  • CVE-2026-8953: Sandbox escape due to use-after-free in the Disability Access APIs component.
  • CVE-2026-8954: Incorrect boundary conditions, integer overflow in the Audio/Video component.
  • CVE-2026-8955: Privilege escalation in the DOM: Workers component.
  • CVE-2026-8956: Integer overflow in the Networking: JAR component.
  • CVE-2026-8957: Privilege escalation in the Enterprise Policies component.
  • CVE-2026-8958: Information disclosure, sandbox escape in the Security: Process Sandboxing component.
  • CVE-2026-8959: Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component.
  • CVE-2026-8961: Spoofing issue in the Form Autofill component.
  • CVE-2026-8962: Mitigation bypass in the DOM: Security component.
  • CVE-2026-8968: Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component.
  • CVE-2026-8970: Privilege escalation in the Security component.
  • CVE-2026-8974: Memory safety bugs fixed in Firefox ESR 140.11 and Firefox 151.
  • CVE-2026-8975: Memory safety bugs fixed in Firefox ESR 115.36, Firefox ESR 140.11 and Firefox 151.
Record
SUSE-SU-2026:2109-1
Updated
2026-11-02
OSVSUSE-SU-2026:21828-1 No score

Security update for MozillaFirefox

This update for MozillaFirefox fixes the following issues

  • Update to Firefox Extended Support Release 140.11.0 ESR MFSA 2026-48 (bsc#1265212).

MFSA 2026-48:

  • CVE-2026-8388: Incorrect boundary conditions in the JavaScript Engine: JIT component.
  • CVE-2026-8391: Other issue in the JavaScript Engine component.
  • CVE-2026-8401: Sandbox escape in the Profile Backup component.
  • CVE-2026-8946: Incorrect boundary conditions in the Audio/Video: Web Codecs component.
  • CVE-2026-8947: Use-after-free in the DOM: Bindings (WebIDL) component.
  • CVE-2026-8949: Integer overflow in the Widget: Win32 component.
  • CVE-2026-8950: Same-origin policy bypass in the Networking: HTTP component.
  • CVE-2026-8953: Sandbox escape due to use-after-free in the Disability Access APIs component.
  • CVE-2026-8954: Incorrect boundary conditions, integer overflow in the Audio/Video component.
  • CVE-2026-8955: Privilege escalation in the DOM: Workers component.
  • CVE-2026-8956: Integer overflow in the Networking: JAR component.
  • CVE-2026-8957: Privilege escalation in the Enterprise Policies component.
  • CVE-2026-8958: Information disclosure, sandbox escape in the Security: Process Sandboxing component.
  • CVE-2026-8959: Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component.
  • CVE-2026-8961: Spoofing issue in the Form Autofill component.
  • CVE-2026-8962: Mitigation bypass in the DOM: Security component.
  • CVE-2026-8968: Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component.
  • CVE-2026-8970: Privilege escalation in the Security component.
  • CVE-2026-8974: Memory safety bugs fixed in Firefox ESR 140.11 and Firefox 151.
  • CVE-2026-8975: Memory safety bugs fixed in Firefox ESR 115.36, Firefox ESR 140.11 and Firefox 151.
Record
SUSE-SU-2026:21828-1
Updated
2026-11-02
OSVSUSE-SU-2026:2271-1 No score

Security update for MozillaThunderbird

This update for MozillaThunderbird fixes the following issues

  • Updated to Mozilla Thunderbird 140.11 (bsc#1265212)

MFSA 2026-44:

  • CVE-2026-8090: Use-after-free in the DOM: Networking component.
  • CVE-2026-8092: Memory safety bugs fixed in Thunderbird ESR 140.10.2 and Thunderbird 150.0.2.
  • CVE-2026-8094: Other issue in the WebRTC component.

MFSA 2026-51:

  • CVE-2026-8388: Incorrect boundary conditions in the JavaScript Engine: JIT component.
  • CVE-2026-8391: Other issue in the JavaScript Engine component.
  • CVE-2026-8401: Sandbox escape in the Profile Backup component.
  • CVE-2026-8946: Incorrect boundary conditions in the Audio/Video: Web Codecs component.
  • CVE-2026-8947: Use-after-free in the DOM: Bindings (WebIDL) component.
  • CVE-2026-8949: Integer overflow in the Widget: Win32 component.
  • CVE-2026-8950: Same-origin policy bypass in the Networking: HTTP component.
  • CVE-2026-8953: Sandbox escape due to use-after-free in the Disability Access APIs component.
  • CVE-2026-8954: Incorrect boundary conditions, integer overflow in the Audio/Video component.
  • CVE-2026-8955: Privilege escalation in the DOM: Workers component.
  • CVE-2026-8956: Integer overflow in the Networking: JAR component.
  • CVE-2026-8957: Privilege escalation in the Enterprise Policies component.
  • CVE-2026-8958: Information disclosure, sandbox escape in the Security: Process Sandboxing component.
  • CVE-2026-8959: Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component.
  • CVE-2026-8961: Spoofing issue in the Form Autofill component.
  • CVE-2026-8962: Mitigation bypass in the DOM: Security component.
  • CVE-2026-8968: Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component.
  • CVE-2026-8970: Privilege escalation in the Security component.
  • CVE-2026-8974: Memory safety bugs fixed in Thunderbird 140.11 and Thunderbird 151.
  • CVE-2026-8975: Memory safety bugs fixed in Thunderbird 140.11 and Thunderbird 151.
Record
SUSE-SU-2026:2271-1
Updated
2026-11-02

Affected products

Show 6 moreShow less

Affected packages

Affected packages
PackageAffectedFixed
firefox
AlmaLinux:9
From an advisory covering 18 CVEs
 before 140.11.0-1.el9_8.alma.1
140.11.0-1.el9_8.alma.1
firefox-x11
AlmaLinux:9
From an advisory covering 18 CVEs
 before 140.11.0-1.el9_8.alma.1
140.11.0-1.el9_8.alma.1
firefox
AlmaLinux:10
From an advisory covering 18 CVEs
 before 140.11.0-1.el10_2
140.11.0-1.el10_2
thunderbird
AlmaLinux:9
From an advisory covering 19 CVEs
 before 140.11.0-1.el9_8.alma.1
140.11.0-1.el9_8.alma.1
firefox
AlmaLinux:8
From an advisory covering 18 CVEs
 before 140.11.0-1.el8_10.alma.1
140.11.0-1.el8_10.alma.1
thunderbird
AlmaLinux:10
From an advisory covering 19 CVEs
 before 140.11.0-1.el10_2.alma.1
140.11.0-1.el10_2.alma.1
thunderbird
AlmaLinux:8
From an advisory covering 22 CVEs
 before 140.11.0-1.el8_10.alma.1
140.11.0-1.el8_10.alma.1
firefox-esr
Debian:12
 before 140.11.0esr-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
140.11.0esr-1~deb12u1
firefox-esr
Debian:13
 before 140.11.0esr-1~deb13u1, plus listed versions
128.13.0esr-1128.14.0esr-1128.14.0esr-1~deb11u1128.14.0esr-1~deb12u1128.14.0esr-1~deb13u1
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140.10.0esr-1140.10.0esr-1~deb11u1140.10.0esr-1~deb12u1140.10.0esr-1~deb13u1140.10.1esr-1140.10.1esr-1~deb11u1140.10.1esr-1~deb12u1140.10.1esr-1~deb13u1140.10.2esr-1140.10.2esr-1~deb11u1140.10.2esr-1~deb12u1140.10.2esr-1~deb13u1140.11.0esr-1~deb11u1140.11.0esr-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~deb13u1
140.11.0esr-1~deb13u1
firefox-esr
Debian:14
 before 140.11.0esr-1, plus listed versions
128.13.0esr-1128.14.0esr-1128.14.0esr-1~deb11u1128.14.0esr-1~deb12u1128.14.0esr-1~deb13u1
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140.10.0esr-1140.10.0esr-1~deb11u1140.10.0esr-1~deb12u1140.10.0esr-1~deb13u1140.10.1esr-1140.10.1esr-1~deb11u1140.10.1esr-1~deb12u1140.10.1esr-1~deb13u1140.10.2esr-1140.10.2esr-1~deb11u1140.10.2esr-1~deb12u1140.10.2esr-1~deb13u1140.11.0esr-1~deb11u1140.11.0esr-1~deb12u1140.11.0esr-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~deb12u1
140.11.0esr-1
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Affected packages
PackageAffectedFixed
thunderbird
Debian:12
 before 1:140.11.0esr-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
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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
1:140.11.0esr-1~deb12u1
thunderbird
Debian:13
 before 1:140.11.0esr-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
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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-11:140.10.0esr-1~deb11u11:140.10.0esr-1~deb12u11:140.10.0esr-1~deb13u11:140.10.1esr-11:140.10.1esr-1~deb11u11:140.10.1esr-1~deb12u11:140.10.1esr-1~deb13u11:140.10.2esr-11:140.10.2esr-1~deb11u11:140.10.2esr-1~deb12u11:140.10.2esr-1~deb13u11:140.11.0esr-1~deb11u11:140.11.0esr-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~deb12u1
1:140.11.0esr-1~deb13u1
thunderbird
Debian:14
 before 1:140.11.0esr-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
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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-11:140.10.0esr-1~deb11u11:140.10.0esr-1~deb12u11:140.10.0esr-1~deb13u11:140.10.1esr-11:140.10.1esr-1~deb11u11:140.10.1esr-1~deb12u11:140.10.1esr-1~deb13u11:140.10.2esr-11:140.10.2esr-1~deb11u11:140.10.2esr-1~deb12u11:140.10.2esr-1~deb13u11:140.11.0esr-1~deb11u11:140.11.0esr-1~deb12u11:140.11.0esr-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~deb11u1
1:140.11.0esr-1
thunderbird
Mageia:9
From an advisory covering 18 CVEs
 before 140.11.0-1.mga9
140.11.0-1.mga9
thunderbird-l10n
Mageia:9
From an advisory covering 18 CVEs
 before 140.11.0-1.mga9
140.11.0-1.mga9
nspr
Mageia:9
From an advisory covering 18 CVEs
 before 4.39.0-1.mga9
4.39.0-1.mga9
nss
Mageia:9
From an advisory covering 18 CVEs
 before 3.124.0-1.mga9
3.124.0-1.mga9
firefox
Mageia:9
From an advisory covering 18 CVEs
 before 140.11.0-1.mga9
140.11.0-1.mga9
firefox-l10n
Mageia:9
From an advisory covering 18 CVEs
 before 140.11.0-1.mga9
140.11.0-1.mga9
firefox
openEuler:24.03-LTS-SP3
From an advisory covering 20 CVEs
 before 140.11.0-1.oe2403sp3
140.11.0-1.oe2403sp3
firefox
openEuler:22.03-LTS-SP4
From an advisory covering 20 CVEs
 before 140.11.0-1.oe2203sp4
140.11.0-1.oe2203sp4
firefox
openEuler:24.03-LTS
From an advisory covering 20 CVEs
 before 140.11.0-1.oe2403
140.11.0-1.oe2403
firefox
openEuler:24.03-LTS-SP1
From an advisory covering 20 CVEs
 before 140.11.0-1.oe2403sp1
140.11.0-1.oe2403sp1
thunderbird
openEuler:24.03-LTS-SP3
From an advisory covering 49 CVEs
 before 140.12.0-1.oe2403sp3
140.12.0-1.oe2403sp3
firefox
Red Hat:enterprise_linux:9::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el9_8
0:140.11.0-1.el9_8
firefox-debuginfo
Red Hat:enterprise_linux:9::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el9_8
0:140.11.0-1.el9_8
firefox-debugsource
Red Hat:enterprise_linux:9::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el9_8
0:140.11.0-1.el9_8
firefox-x11
Red Hat:enterprise_linux:9::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el9_8
0:140.11.0-1.el9_8
firefox
Red Hat:enterprise_linux:10.2
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el10_2
0:140.11.0-1.el10_2
firefox-debuginfo
Red Hat:enterprise_linux:10.2
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el10_2
0:140.11.0-1.el10_2
firefox-debugsource
Red Hat:enterprise_linux:10.2
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el10_2
0:140.11.0-1.el10_2
thunderbird
Red Hat:enterprise_linux:9::appstream
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el9_8
0:140.11.0-1.el9_8
thunderbird-debuginfo
Red Hat:enterprise_linux:9::appstream
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el9_8
0:140.11.0-1.el9_8
thunderbird-debugsource
Red Hat:enterprise_linux:9::appstream
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el9_8
0:140.11.0-1.el9_8
firefox
Red Hat:enterprise_linux:8::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el8_10
0:140.11.0-1.el8_10
firefox-debuginfo
Red Hat:enterprise_linux:8::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el8_10
0:140.11.0-1.el8_10
firefox-debugsource
Red Hat:enterprise_linux:8::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el8_10
0:140.11.0-1.el8_10
thunderbird
Red Hat:enterprise_linux:10.2
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el10_2
0:140.11.0-1.el10_2
thunderbird-debuginfo
Red Hat:enterprise_linux:10.2
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el10_2
0:140.11.0-1.el10_2
thunderbird-debugsource
Red Hat:enterprise_linux:10.2
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el10_2
0:140.11.0-1.el10_2
thunderbird
Red Hat:enterprise_linux:8::appstream
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el8_10
0:140.11.0-1.el8_10
thunderbird-debuginfo
Red Hat:enterprise_linux:8::appstream
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el8_10
0:140.11.0-1.el8_10
thunderbird-debugsource
Red Hat:enterprise_linux:8::appstream
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el8_10
0:140.11.0-1.el8_10
thunderbird
Red Hat:rhel_e4s:9.4::appstream
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el9_4
0:140.11.0-1.el9_4
thunderbird-debuginfo
Red Hat:rhel_e4s:9.4::appstream
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el9_4
0:140.11.0-1.el9_4
thunderbird-debugsource
Red Hat:rhel_e4s:9.4::appstream
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el9_4
0:140.11.0-1.el9_4
thunderbird
Red Hat:rhel_e4s:8.8::appstream
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el8_8
0:140.11.0-1.el8_8
thunderbird-debuginfo
Red Hat:rhel_e4s:8.8::appstream
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el8_8
0:140.11.0-1.el8_8
thunderbird-debugsource
Red Hat:rhel_e4s:8.8::appstream
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el8_8
0:140.11.0-1.el8_8
thunderbird
Red Hat:rhel_tus:8.8::appstream
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el8_8
0:140.11.0-1.el8_8
thunderbird-debuginfo
Red Hat:rhel_tus:8.8::appstream
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el8_8
0:140.11.0-1.el8_8
thunderbird-debugsource
Red Hat:rhel_tus:8.8::appstream
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el8_8
0:140.11.0-1.el8_8
thunderbird
Red Hat:rhel_e4s:9.2::appstream
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el9_2
0:140.11.0-1.el9_2
thunderbird-debuginfo
Red Hat:rhel_e4s:9.2::appstream
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el9_2
0:140.11.0-1.el9_2
thunderbird-debugsource
Red Hat:rhel_e4s:9.2::appstream
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el9_2
0:140.11.0-1.el9_2
thunderbird
Red Hat:rhel_aus:8.4::appstream
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el8_4
0:140.11.0-1.el8_4
thunderbird-debuginfo
Red Hat:rhel_aus:8.4::appstream
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el8_4
0:140.11.0-1.el8_4
thunderbird-debugsource
Red Hat:rhel_aus:8.4::appstream
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el8_4
0:140.11.0-1.el8_4
thunderbird
Red Hat:rhel_eus_long_life:8.4::appstream
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el8_4
0:140.11.0-1.el8_4
thunderbird-debuginfo
Red Hat:rhel_eus_long_life:8.4::appstream
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el8_4
0:140.11.0-1.el8_4
thunderbird-debugsource
Red Hat:rhel_eus_long_life:8.4::appstream
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el8_4
0:140.11.0-1.el8_4
firefox
Red Hat:rhel_e4s:9.2::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el9_2
0:140.11.0-1.el9_2
firefox-debuginfo
Red Hat:rhel_e4s:9.2::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el9_2
0:140.11.0-1.el9_2
firefox-debugsource
Red Hat:rhel_e4s:9.2::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el9_2
0:140.11.0-1.el9_2
firefox-x11
Red Hat:rhel_e4s:9.2::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el9_2
0:140.11.0-1.el9_2
firefox
Red Hat:rhel_eus:9.6::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el9_6
0:140.11.0-1.el9_6
firefox-debuginfo
Red Hat:rhel_eus:9.6::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el9_6
0:140.11.0-1.el9_6
firefox-debugsource
Red Hat:rhel_eus:9.6::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el9_6
0:140.11.0-1.el9_6
firefox-x11
Red Hat:rhel_eus:9.6::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el9_6
0:140.11.0-1.el9_6
firefox
Red Hat:rhel_e4s:9.4::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el9_4
0:140.11.0-1.el9_4
firefox-debuginfo
Red Hat:rhel_e4s:9.4::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el9_4
0:140.11.0-1.el9_4
firefox-debugsource
Red Hat:rhel_e4s:9.4::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el9_4
0:140.11.0-1.el9_4
firefox-x11
Red Hat:rhel_e4s:9.4::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el9_4
0:140.11.0-1.el9_4
thunderbird
Red Hat:rhel_eus:9.6::appstream
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el9_6
0:140.11.0-1.el9_6
thunderbird-debuginfo
Red Hat:rhel_eus:9.6::appstream
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el9_6
0:140.11.0-1.el9_6
thunderbird-debugsource
Red Hat:rhel_eus:9.6::appstream
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el9_6
0:140.11.0-1.el9_6
thunderbird
Red Hat:rhel_aus:8.6::appstream
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el8_6
0:140.11.0-1.el8_6
thunderbird-debuginfo
Red Hat:rhel_aus:8.6::appstream
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el8_6
0:140.11.0-1.el8_6
thunderbird-debugsource
Red Hat:rhel_aus:8.6::appstream
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el8_6
0:140.11.0-1.el8_6
thunderbird
Red Hat:rhel_eus_long_life:8.6::appstream
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el8_6
0:140.11.0-1.el8_6
thunderbird-debuginfo
Red Hat:rhel_eus_long_life:8.6::appstream
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el8_6
0:140.11.0-1.el8_6
thunderbird-debugsource
Red Hat:rhel_eus_long_life:8.6::appstream
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el8_6
0:140.11.0-1.el8_6
thunderbird
Red Hat:enterprise_linux_eus:10.0
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el10_0
0:140.11.0-1.el10_0
thunderbird-debuginfo
Red Hat:enterprise_linux_eus:10.0
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el10_0
0:140.11.0-1.el10_0
thunderbird-debugsource
Red Hat:enterprise_linux_eus:10.0
From an advisory covering 22 CVEs
 before 0:140.11.0-1.el10_0
0:140.11.0-1.el10_0
firefox
Red Hat:rhel_els:7
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el7_9
0:140.11.0-1.el7_9
firefox-debuginfo
Red Hat:rhel_els:7
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el7_9
0:140.11.0-1.el7_9
firefox
Red Hat:rhel_aus:8.6::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el8_6
0:140.11.0-1.el8_6
firefox-debuginfo
Red Hat:rhel_aus:8.6::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el8_6
0:140.11.0-1.el8_6
firefox-debugsource
Red Hat:rhel_aus:8.6::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el8_6
0:140.11.0-1.el8_6
firefox
Red Hat:rhel_eus_long_life:8.6::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el8_6
0:140.11.0-1.el8_6
firefox-debuginfo
Red Hat:rhel_eus_long_life:8.6::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el8_6
0:140.11.0-1.el8_6
firefox-debugsource
Red Hat:rhel_eus_long_life:8.6::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el8_6
0:140.11.0-1.el8_6
firefox
Red Hat:rhel_aus:8.4::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el8_4
0:140.11.0-1.el8_4
firefox-debuginfo
Red Hat:rhel_aus:8.4::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el8_4
0:140.11.0-1.el8_4
firefox-debugsource
Red Hat:rhel_aus:8.4::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el8_4
0:140.11.0-1.el8_4
firefox
Red Hat:rhel_eus_long_life:8.4::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el8_4
0:140.11.0-1.el8_4
firefox-debuginfo
Red Hat:rhel_eus_long_life:8.4::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el8_4
0:140.11.0-1.el8_4
firefox-debugsource
Red Hat:rhel_eus_long_life:8.4::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el8_4
0:140.11.0-1.el8_4
firefox
Red Hat:rhel_e4s:8.8::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el8_8
0:140.11.0-1.el8_8
firefox-debuginfo
Red Hat:rhel_e4s:8.8::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el8_8
0:140.11.0-1.el8_8
firefox-debugsource
Red Hat:rhel_e4s:8.8::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el8_8
0:140.11.0-1.el8_8
firefox
Red Hat:rhel_tus:8.8::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el8_8
0:140.11.0-1.el8_8
firefox-debuginfo
Red Hat:rhel_tus:8.8::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el8_8
0:140.11.0-1.el8_8
firefox-debugsource
Red Hat:rhel_tus:8.8::appstream
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el8_8
0:140.11.0-1.el8_8
firefox
Red Hat:enterprise_linux_eus:10.0
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el10_0
0:140.11.0-1.el10_0
firefox-debuginfo
Red Hat:enterprise_linux_eus:10.0
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el10_0
0:140.11.0-1.el10_0
firefox-debugsource
Red Hat:enterprise_linux_eus:10.0
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el10_0
0:140.11.0-1.el10_0
firefox
Rocky Linux:9
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el9_8
0:140.11.0-1.el9_8
firefox
Rocky Linux:10
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el10_2
0:140.11.0-1.el10_2
thunderbird
Rocky Linux:9
From an advisory covering 19 CVEs
 before 0:140.11.0-1.el9_8
0:140.11.0-1.el9_8
firefox
Rocky Linux:8
From an advisory covering 18 CVEs
 before 0:140.11.0-1.el8_10
0:140.11.0-1.el8_10
thunderbird
Rocky Linux:10
From an advisory covering 19 CVEs
 before 0:140.11.0-1.el10_2
0:140.11.0-1.el10_2
thunderbird
Rocky Linux:8
From an advisory covering 19 CVEs
 before 0:140.11.0-1.el8_10
0:140.11.0-1.el8_10
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
firefox-esr
openSUSE:Tumbleweed
From an advisory covering 20 CVEs
 before 140.11.0-1.1
140.11.0-1.1
MozillaThunderbird
openSUSE:Tumbleweed
From an advisory covering 20 CVEs
 before 140.11.1-1.1
140.11.1-1.1
MozillaThunderbird
openSUSE:Leap 16.0
From an advisory covering 56 CVEs
 before 140.12.0-bp160.1.1
140.12.0-bp160.1.1

History

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

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

In short

CVE-2026-8391 is a medium vulnerability (CVSS 5.3) in Mozilla Firefox, published May 12, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.30%, the 22nd percentile. Fixed in firefox-esr 140.11.0esr-1~deb12u1.

References

Show 194 moreShow less
This page doesn't list everything

Left out here: 345 versions, 88 references and the rest of 6 source descriptions. The JSON record has them.

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