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CVE-2008-4066

Mozilla Firefox 2.0.0.14, and other versions before 2.0.0.17, allows remote attackers to bypass...

4.3 MediumFix available

CVE-2008-4066 is a medium vulnerability (CVSS 4.3) in Mozilla Firefox, published September 24, 2008. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.76%, the 78th percentile. Fixed in iceweasel 2.0.0.17-0etch1.

Mozilla Firefox 2.0.0.14, and other versions before 2.0.0.17, allows remote attackers to bypass cross-site scripting (XSS) protection mechanisms and conduct XSS attacks via HTML-escaped low surrogate characters that are ignored by the HTML parser, as demonstrated by a "jav&#56325ascript" sequence, aka "HTML escaped low surrogates bug."

Exploit likelihood

1.76%Down 2.2 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 4.3

Mozilla Firefox 2.0.0.14, and other versions before 2.0.0.17, allows remote attackers to bypass cross-site scripting (XSS) protection mechanisms and conduct XSS attacks via HTML-escaped low surrogate characters that are ignored by the HTML parser, as demonstrated by a "jav&#56325ascript" sequence, aka "HTML escaped low surrogates bug."

Record
CVE-2008-4066
CVSS 2.0
4.3 MediumAV:N/AC:M/Au:N/C:N/I:P/A:N
Weakness
CWE-79
Updated
2026-11-02
CVE List No score

Mozilla Firefox 2.0.0.14, and other versions before 2.0.0.17, allows remote attackers to bypass cross-site scripting (XSS) protection mechanisms and conduct XSS attacks via HTML-escaped low surrogate characters that are ignored by the HTML parser, as demonstrated by a "jav&#56325ascript" sequence, aka "HTML escaped low surrogates bug."

Record
CVE-2008-4066
Updated
2026-11-02
EUVDEUVD-2008-4051 No score

Mozilla Firefox 2.0.0.14, and other versions before 2.0.0.17, allows remote attackers to bypass cross-site scripting (XSS) protection mechanisms and conduct XSS attacks via HTML-escaped low surrogate characters that are ignored by the HTML parser, as demonstrated by a "jav&#56325ascript" sequence, aka "HTML escaped low surrogates bug."

Record
EUVD-2008-4051
Updated
2026-11-03
GitHub AdvisoriesGHSA-qqhw-rv6h-rvpx No score

Mozilla Firefox 2.0.0.14, and other versions before 2.0.0.17, allows remote attackers to bypass...

Mozilla Firefox 2.0.0.14, and other versions before 2.0.0.17, allows remote attackers to bypass cross-site scripting (XSS) protection mechanisms and conduct XSS attacks via HTML-escaped low surrogate characters that are ignored by the HTML parser, as demonstrated by a "jav&#56325ascript" sequence, aka "HTML escaped low surrogates bug."

Record
GHSA-qqhw-rv6h-rvpx
Weakness
CWE-79
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
iceweasel
Debian:4.0
before 2.0.0.17-0etch1, plus listed versions
2.0.0.10-0etch12.0.0.10-12.0.0.10-22.0.0.11-12.0.0.12-0etch1
Show 26 moreShow less
2.0.0.12-12.0.0.12-22.0.0.13-0etch12.0.0.13-12.0.0.14-0etch12.0.0.14-12.0.0.14-22.0.0.15-0etch12.0.0.16-0etch12.0.0.3-12.0.0.3-22.0.0.4-0etch12.0.0.4-12.0.0.5-0etch12.0.0.5-0etch1+lenny12.0.0.5-12.0.0.5-22.0.0.6+2.0.0.8-0etch12.0.0.6-0etch12.0.0.6-0etch1+lenny12.0.0.6-12.0.0.7-12.0.0.7-22.0.0.8-12.0.0.9-12.0.0.9-2
2.0.0.17-0etch1
xulrunner
Debian:4.0
before 1.8.0.15~pre080614h-0etch1, plus listed versions
1.8.0.11-21.8.0.11-31.8.0.11-41.8.0.11-4.11.8.0.12-0etch1
Show 12 moreShow less
1.8.0.13~pre070720-0etch11.8.0.13~pre070720-0etch21.8.0.13~pre070720-0etch31.8.0.13~pre070720-0etch3+lenny11.8.0.14~pre071019b-0etch11.8.0.14~pre071019b-0lenny11.8.0.14~pre071019c-0etch11.8.0.15~pre080131a-0etch11.8.0.15~pre080131b-0etch11.8.0.15~pre080323b-0etch11.8.0.15~pre080323b-0etch21.8.0.15~pre080614d-0etch1
1.8.0.15~pre080614h-0etch1
seamonkey
Red Hat:enterprise_linux:2.1::as
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey-chat
Red Hat:enterprise_linux:2.1::as
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey-devel
Red Hat:enterprise_linux:2.1::as
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey-dom-inspector
Red Hat:enterprise_linux:2.1::as
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey-js-debugger
Red Hat:enterprise_linux:2.1::as
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey-mail
Red Hat:enterprise_linux:2.1::as
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey-nspr
Red Hat:enterprise_linux:2.1::as
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey-nspr-devel
Red Hat:enterprise_linux:2.1::as
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
Show 128 moreShow less
Affected packages
PackageAffectedFixed
seamonkey-nss
Red Hat:enterprise_linux:2.1::as
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey-nss-devel
Red Hat:enterprise_linux:2.1::as
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey
Red Hat:enterprise_linux:2.1::aw
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey-chat
Red Hat:enterprise_linux:2.1::aw
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey-devel
Red Hat:enterprise_linux:2.1::aw
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey-dom-inspector
Red Hat:enterprise_linux:2.1::aw
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey-js-debugger
Red Hat:enterprise_linux:2.1::aw
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey-mail
Red Hat:enterprise_linux:2.1::aw
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey-nspr
Red Hat:enterprise_linux:2.1::aw
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey-nspr-devel
Red Hat:enterprise_linux:2.1::aw
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey-nss
Red Hat:enterprise_linux:2.1::aw
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey-nss-devel
Red Hat:enterprise_linux:2.1::aw
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey
Red Hat:enterprise_linux:2.1::es
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey-chat
Red Hat:enterprise_linux:2.1::es
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey-devel
Red Hat:enterprise_linux:2.1::es
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey-dom-inspector
Red Hat:enterprise_linux:2.1::es
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey-js-debugger
Red Hat:enterprise_linux:2.1::es
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey-mail
Red Hat:enterprise_linux:2.1::es
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey-nspr
Red Hat:enterprise_linux:2.1::es
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey-nspr-devel
Red Hat:enterprise_linux:2.1::es
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey-nss
Red Hat:enterprise_linux:2.1::es
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey-nss-devel
Red Hat:enterprise_linux:2.1::es
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey
Red Hat:enterprise_linux:2.1::ws
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey-chat
Red Hat:enterprise_linux:2.1::ws
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey-devel
Red Hat:enterprise_linux:2.1::ws
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey-dom-inspector
Red Hat:enterprise_linux:2.1::ws
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey-js-debugger
Red Hat:enterprise_linux:2.1::ws
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey-mail
Red Hat:enterprise_linux:2.1::ws
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey-nspr
Red Hat:enterprise_linux:2.1::ws
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey-nspr-devel
Red Hat:enterprise_linux:2.1::ws
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey-nss
Red Hat:enterprise_linux:2.1::ws
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey-nss-devel
Red Hat:enterprise_linux:2.1::ws
before 0:1.0.9-0.20.el2
0:1.0.9-0.20.el2
seamonkey
Red Hat:enterprise_linux:3::as
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-chat
Red Hat:enterprise_linux:3::as
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-debuginfo
Red Hat:enterprise_linux:3::as
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-devel
Red Hat:enterprise_linux:3::as
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-dom-inspector
Red Hat:enterprise_linux:3::as
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-js-debugger
Red Hat:enterprise_linux:3::as
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-mail
Red Hat:enterprise_linux:3::as
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-nspr
Red Hat:enterprise_linux:3::as
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-nspr-devel
Red Hat:enterprise_linux:3::as
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-nss
Red Hat:enterprise_linux:3::as
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-nss-devel
Red Hat:enterprise_linux:3::as
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey
Red Hat:enterprise_linux:3::desktop
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-chat
Red Hat:enterprise_linux:3::desktop
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-debuginfo
Red Hat:enterprise_linux:3::desktop
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-devel
Red Hat:enterprise_linux:3::desktop
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-dom-inspector
Red Hat:enterprise_linux:3::desktop
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-js-debugger
Red Hat:enterprise_linux:3::desktop
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-mail
Red Hat:enterprise_linux:3::desktop
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-nspr
Red Hat:enterprise_linux:3::desktop
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-nspr-devel
Red Hat:enterprise_linux:3::desktop
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-nss
Red Hat:enterprise_linux:3::desktop
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-nss-devel
Red Hat:enterprise_linux:3::desktop
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey
Red Hat:enterprise_linux:3::es
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-chat
Red Hat:enterprise_linux:3::es
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-debuginfo
Red Hat:enterprise_linux:3::es
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-devel
Red Hat:enterprise_linux:3::es
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-dom-inspector
Red Hat:enterprise_linux:3::es
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-js-debugger
Red Hat:enterprise_linux:3::es
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-mail
Red Hat:enterprise_linux:3::es
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-nspr
Red Hat:enterprise_linux:3::es
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-nspr-devel
Red Hat:enterprise_linux:3::es
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-nss
Red Hat:enterprise_linux:3::es
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-nss-devel
Red Hat:enterprise_linux:3::es
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey
Red Hat:enterprise_linux:3::ws
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-chat
Red Hat:enterprise_linux:3::ws
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-debuginfo
Red Hat:enterprise_linux:3::ws
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-devel
Red Hat:enterprise_linux:3::ws
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-dom-inspector
Red Hat:enterprise_linux:3::ws
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-js-debugger
Red Hat:enterprise_linux:3::ws
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-mail
Red Hat:enterprise_linux:3::ws
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-nspr
Red Hat:enterprise_linux:3::ws
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-nspr-devel
Red Hat:enterprise_linux:3::ws
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-nss
Red Hat:enterprise_linux:3::ws
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
seamonkey-nss-devel
Red Hat:enterprise_linux:3::ws
before 0:1.0.9-0.24.el3
0:1.0.9-0.24.el3
devhelp
Red Hat:enterprise_linux:4::as
before 0:0.10-0.10.el4
0:0.10-0.10.el4
devhelp-debuginfo
Red Hat:enterprise_linux:4::as
before 0:0.10-0.10.el4
0:0.10-0.10.el4
devhelp-devel
Red Hat:enterprise_linux:4::as
before 0:0.10-0.10.el4
0:0.10-0.10.el4
seamonkey
Red Hat:enterprise_linux:4::as
before 0:1.0.9-26.el4
0:1.0.9-26.el4
seamonkey-chat
Red Hat:enterprise_linux:4::as
before 0:1.0.9-26.el4
0:1.0.9-26.el4
seamonkey-debuginfo
Red Hat:enterprise_linux:4::as
before 0:1.0.9-26.el4
0:1.0.9-26.el4
seamonkey-devel
Red Hat:enterprise_linux:4::as
before 0:1.0.9-26.el4
0:1.0.9-26.el4
seamonkey-dom-inspector
Red Hat:enterprise_linux:4::as
before 0:1.0.9-26.el4
0:1.0.9-26.el4
seamonkey-js-debugger
Red Hat:enterprise_linux:4::as
before 0:1.0.9-26.el4
0:1.0.9-26.el4
seamonkey-mail
Red Hat:enterprise_linux:4::as
before 0:1.0.9-26.el4
0:1.0.9-26.el4
devhelp
Red Hat:enterprise_linux:4::desktop
before 0:0.10-0.10.el4
0:0.10-0.10.el4
devhelp-debuginfo
Red Hat:enterprise_linux:4::desktop
before 0:0.10-0.10.el4
0:0.10-0.10.el4
devhelp-devel
Red Hat:enterprise_linux:4::desktop
before 0:0.10-0.10.el4
0:0.10-0.10.el4
seamonkey
Red Hat:enterprise_linux:4::desktop
before 0:1.0.9-26.el4
0:1.0.9-26.el4
seamonkey-chat
Red Hat:enterprise_linux:4::desktop
before 0:1.0.9-26.el4
0:1.0.9-26.el4
seamonkey-debuginfo
Red Hat:enterprise_linux:4::desktop
before 0:1.0.9-26.el4
0:1.0.9-26.el4
seamonkey-devel
Red Hat:enterprise_linux:4::desktop
before 0:1.0.9-26.el4
0:1.0.9-26.el4
seamonkey-dom-inspector
Red Hat:enterprise_linux:4::desktop
before 0:1.0.9-26.el4
0:1.0.9-26.el4
seamonkey-js-debugger
Red Hat:enterprise_linux:4::desktop
before 0:1.0.9-26.el4
0:1.0.9-26.el4
seamonkey-mail
Red Hat:enterprise_linux:4::desktop
before 0:1.0.9-26.el4
0:1.0.9-26.el4
devhelp
Red Hat:enterprise_linux:4::es
before 0:0.10-0.10.el4
0:0.10-0.10.el4
devhelp-debuginfo
Red Hat:enterprise_linux:4::es
before 0:0.10-0.10.el4
0:0.10-0.10.el4
devhelp-devel
Red Hat:enterprise_linux:4::es
before 0:0.10-0.10.el4
0:0.10-0.10.el4
seamonkey
Red Hat:enterprise_linux:4::es
before 0:1.0.9-26.el4
0:1.0.9-26.el4
seamonkey-chat
Red Hat:enterprise_linux:4::es
before 0:1.0.9-26.el4
0:1.0.9-26.el4
seamonkey-debuginfo
Red Hat:enterprise_linux:4::es
before 0:1.0.9-26.el4
0:1.0.9-26.el4
seamonkey-devel
Red Hat:enterprise_linux:4::es
before 0:1.0.9-26.el4
0:1.0.9-26.el4
seamonkey-dom-inspector
Red Hat:enterprise_linux:4::es
before 0:1.0.9-26.el4
0:1.0.9-26.el4
seamonkey-js-debugger
Red Hat:enterprise_linux:4::es
before 0:1.0.9-26.el4
0:1.0.9-26.el4
seamonkey-mail
Red Hat:enterprise_linux:4::es
before 0:1.0.9-26.el4
0:1.0.9-26.el4
devhelp
Red Hat:enterprise_linux:4::ws
before 0:0.10-0.10.el4
0:0.10-0.10.el4
devhelp-debuginfo
Red Hat:enterprise_linux:4::ws
before 0:0.10-0.10.el4
0:0.10-0.10.el4
devhelp-devel
Red Hat:enterprise_linux:4::ws
before 0:0.10-0.10.el4
0:0.10-0.10.el4
seamonkey
Red Hat:enterprise_linux:4::ws
before 0:1.0.9-26.el4
0:1.0.9-26.el4
seamonkey-chat
Red Hat:enterprise_linux:4::ws
before 0:1.0.9-26.el4
0:1.0.9-26.el4
seamonkey-debuginfo
Red Hat:enterprise_linux:4::ws
before 0:1.0.9-26.el4
0:1.0.9-26.el4
seamonkey-devel
Red Hat:enterprise_linux:4::ws
before 0:1.0.9-26.el4
0:1.0.9-26.el4
seamonkey-dom-inspector
Red Hat:enterprise_linux:4::ws
before 0:1.0.9-26.el4
0:1.0.9-26.el4
seamonkey-js-debugger
Red Hat:enterprise_linux:4::ws
before 0:1.0.9-26.el4
0:1.0.9-26.el4
seamonkey-mail
Red Hat:enterprise_linux:4::ws
before 0:1.0.9-26.el4
0:1.0.9-26.el4
thunderbird
Red Hat:enterprise_linux:4::as
before 0:1.5.0.12-16.el4
0:1.5.0.12-16.el4
thunderbird-debuginfo
Red Hat:enterprise_linux:4::as
before 0:1.5.0.12-16.el4
0:1.5.0.12-16.el4
thunderbird
Red Hat:enterprise_linux:4::desktop
before 0:1.5.0.12-16.el4
0:1.5.0.12-16.el4
thunderbird-debuginfo
Red Hat:enterprise_linux:4::desktop
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0:1.5.0.12-16.el4
thunderbird
Red Hat:enterprise_linux:4::es
before 0:1.5.0.12-16.el4
0:1.5.0.12-16.el4
thunderbird-debuginfo
Red Hat:enterprise_linux:4::es
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0:1.5.0.12-16.el4
thunderbird
Red Hat:enterprise_linux:4::ws
before 0:1.5.0.12-16.el4
0:1.5.0.12-16.el4
thunderbird-debuginfo
Red Hat:enterprise_linux:4::ws
before 0:1.5.0.12-16.el4
0:1.5.0.12-16.el4
thunderbird
Red Hat:enterprise_linux:5::client
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0:2.0.0.17-1.el5
thunderbird-debuginfo
Red Hat:enterprise_linux:5::client
before 0:2.0.0.17-1.el5
0:2.0.0.17-1.el5
thunderbird
Red Hat:rhel_productivity:5
before 0:2.0.0.17-1.el5
0:2.0.0.17-1.el5
thunderbird-debuginfo
Red Hat:rhel_productivity:5
before 0:2.0.0.17-1.el5
0:2.0.0.17-1.el5

History

History
WhenChangedSources
2026-11-03aliasesEUVD
2026-11-02createdCVE List, GitHub Advisories, NVD, OSV

References

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