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CVE-2006-4566

Mozilla Firefox before 1.5.0.7, Thunderbird before 1.5.0.7, and SeaMonkey before 1.0.5 allows...

5.0 MediumFix available

CVE-2006-4566 is a medium vulnerability (CVSS 5.0) in Mozilla Firefox, published September 15, 2006. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 4.08%, the 90th percentile. Fixed in thunderbird 1.5.0.7-1.

Mozilla Firefox before 1.5.0.7, Thunderbird before 1.5.0.7, and SeaMonkey before 1.0.5 allows remote attackers to cause a denial of service (crash) via a malformed JavaScript regular expression that ends with a backslash in an unterminated character set ("[\"), which leads to a buffer over-read.

Exploit likelihood

4.08%Down 0.3 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 5.0

Mozilla Firefox before 1.5.0.7, Thunderbird before 1.5.0.7, and SeaMonkey before 1.0.5 allows remote attackers to cause a denial of service (crash) via a malformed JavaScript regular expression that ends with a backslash in an unterminated character set ("[\"), which leads to a buffer over-read.

Record
CVE-2006-4566
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Updated
2026-11-02
CVE List No score

Mozilla Firefox before 1.5.0.7, Thunderbird before 1.5.0.7, and SeaMonkey before 1.0.5 allows remote attackers to cause a denial of service (crash) via a malformed JavaScript regular expression that ends with a backslash in an unterminated character set ("[\"), which leads to a buffer over-read.

Record
CVE-2006-4566
Updated
2026-11-02
EUVDEUVD-2006-4554 No score

Mozilla Firefox before 1.5.0.7, Thunderbird before 1.5.0.7, and SeaMonkey before 1.0.5 allows remote attackers to cause a denial of service (crash) via a malformed JavaScript regular expression that ends with a backslash in an unterminated character set ("[\"), which leads to a buffer over-read.

Record
EUVD-2006-4554
Updated
2026-11-03
GitHub AdvisoriesGHSA-vr27-vq6j-wvvp No score

Mozilla Firefox before 1.5.0.7, Thunderbird before 1.5.0.7, and SeaMonkey before 1.0.5 allows...

Mozilla Firefox before 1.5.0.7, Thunderbird before 1.5.0.7, and SeaMonkey before 1.0.5 allows remote attackers to cause a denial of service (crash) via a malformed JavaScript regular expression that ends with a backslash in an unterminated character set ("[\"), which leads to a buffer over-read.

Record
GHSA-vr27-vq6j-wvvp
Updated
2026-11-02
OSV No score

Mozilla Firefox before 1.5.0.7, Thunderbird before 1.5.0.7, and SeaMonkey before 1.0.5 allows remote attackers to cause a denial of service (crash) via a malformed JavaScript regular expression that ends with a backslash in an unterminated character set ("[\"), which leads to a buffer over-read.

Record
CVE-2006-4566
Updated
2026-11-02
OSVDEBIAN-CVE-2006-4566 No score

Mozilla Firefox before 1.5.0.7, Thunderbird before 1.5.0.7, and SeaMonkey before 1.0.5 allows remote attackers to cause a denial of service (crash) via a malformed JavaScript regular expression that ends with a backslash in an unterminated character set ("[\"), which leads to a buffer over-read.

Record
DEBIAN-CVE-2006-4566
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
thunderbird
Debian:12
 before 1.5.0.7-1
1.5.0.7-1
thunderbird
Debian:13
 before 1.5.0.7-1
1.5.0.7-1
thunderbird
Debian:14
 before 1.5.0.7-1
1.5.0.7-1
mozilla-thunderbird
Debian:3.1
 before 1.0.2-2.sarge1.0.8c.1, plus listed versions
1.0.2-21.0.2-2.sarge1.0.61.0.2-2.sarge1.0.71.0.2-2.sarge1.0.81.0.2-2.sarge1.0.8a1.0.2-2.sarge1.0.8b.11.0.2-2.sarge1.0.8b.2
1.0.2-2.sarge1.0.8c.1
mozilla
Debian:3.1
 before 2:1.7.8-1sarge7.3.1, plus listed versions
2:1.7.8-12:1.7.8-1sarge12:1.7.8-1sarge22:1.7.8-1sarge32:1.7.8-1sarge5
Show 5 moreShow less
2:1.7.8-1sarge62:1.7.8-1sarge72:1.7.8-1sarge7.12:1.7.8-1sarge7.2.12:1.7.8-1sarge7.2.2
2:1.7.8-1sarge7.3.1
mozilla-firefox
Debian:3.1
 before 1.0.4-2sarge12, plus listed versions
1.0.4-21.0.4-2sarge11.0.4-2sarge101.0.4-2sarge111.0.4-2sarge2
Show 6 moreShow less
1.0.4-2sarge31.0.4-2sarge41.0.4-2sarge51.0.4-2sarge61.0.4-2sarge71.0.4-2sarge9
1.0.4-2sarge12
firefox
Red Hat:enterprise_linux:4::as
 before 0:1.5.0.7-0.1.el4
0:1.5.0.7-0.1.el4
firefox-debuginfo
Red Hat:enterprise_linux:4::as
 before 0:1.5.0.7-0.1.el4
0:1.5.0.7-0.1.el4
firefox
Red Hat:enterprise_linux:4::desktop
 before 0:1.5.0.7-0.1.el4
0:1.5.0.7-0.1.el4
firefox-debuginfo
Red Hat:enterprise_linux:4::desktop
 before 0:1.5.0.7-0.1.el4
0:1.5.0.7-0.1.el4
Show 96 moreShow less
Affected packages
PackageAffectedFixed
firefox
Red Hat:enterprise_linux:4::es
 before 0:1.5.0.7-0.1.el4
0:1.5.0.7-0.1.el4
firefox-debuginfo
Red Hat:enterprise_linux:4::es
 before 0:1.5.0.7-0.1.el4
0:1.5.0.7-0.1.el4
firefox
Red Hat:enterprise_linux:4::ws
 before 0:1.5.0.7-0.1.el4
0:1.5.0.7-0.1.el4
firefox-debuginfo
Red Hat:enterprise_linux:4::ws
 before 0:1.5.0.7-0.1.el4
0:1.5.0.7-0.1.el4
seamonkey
Red Hat:enterprise_linux:3::as
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-chat
Red Hat:enterprise_linux:3::as
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-debuginfo
Red Hat:enterprise_linux:3::as
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-devel
Red Hat:enterprise_linux:3::as
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-dom-inspector
Red Hat:enterprise_linux:3::as
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-js-debugger
Red Hat:enterprise_linux:3::as
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-mail
Red Hat:enterprise_linux:3::as
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-nspr
Red Hat:enterprise_linux:3::as
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-nspr-devel
Red Hat:enterprise_linux:3::as
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-nss
Red Hat:enterprise_linux:3::as
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-nss-devel
Red Hat:enterprise_linux:3::as
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey
Red Hat:enterprise_linux:3::desktop
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-chat
Red Hat:enterprise_linux:3::desktop
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-debuginfo
Red Hat:enterprise_linux:3::desktop
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-devel
Red Hat:enterprise_linux:3::desktop
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-dom-inspector
Red Hat:enterprise_linux:3::desktop
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-js-debugger
Red Hat:enterprise_linux:3::desktop
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-mail
Red Hat:enterprise_linux:3::desktop
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-nspr
Red Hat:enterprise_linux:3::desktop
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-nspr-devel
Red Hat:enterprise_linux:3::desktop
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-nss
Red Hat:enterprise_linux:3::desktop
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-nss-devel
Red Hat:enterprise_linux:3::desktop
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey
Red Hat:enterprise_linux:3::es
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-chat
Red Hat:enterprise_linux:3::es
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-debuginfo
Red Hat:enterprise_linux:3::es
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-devel
Red Hat:enterprise_linux:3::es
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-dom-inspector
Red Hat:enterprise_linux:3::es
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-js-debugger
Red Hat:enterprise_linux:3::es
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-mail
Red Hat:enterprise_linux:3::es
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-nspr
Red Hat:enterprise_linux:3::es
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-nspr-devel
Red Hat:enterprise_linux:3::es
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-nss
Red Hat:enterprise_linux:3::es
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-nss-devel
Red Hat:enterprise_linux:3::es
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey
Red Hat:enterprise_linux:3::ws
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-chat
Red Hat:enterprise_linux:3::ws
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-debuginfo
Red Hat:enterprise_linux:3::ws
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-devel
Red Hat:enterprise_linux:3::ws
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-dom-inspector
Red Hat:enterprise_linux:3::ws
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-js-debugger
Red Hat:enterprise_linux:3::ws
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-mail
Red Hat:enterprise_linux:3::ws
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-nspr
Red Hat:enterprise_linux:3::ws
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-nspr-devel
Red Hat:enterprise_linux:3::ws
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-nss
Red Hat:enterprise_linux:3::ws
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
seamonkey-nss-devel
Red Hat:enterprise_linux:3::ws
 before 0:1.0.5-0.1.el3
0:1.0.5-0.1.el3
devhelp
Red Hat:enterprise_linux:4::as
 before 0:0.10-0.4.el4
0:0.10-0.4.el4
devhelp-debuginfo
Red Hat:enterprise_linux:4::as
 before 0:0.10-0.4.el4
0:0.10-0.4.el4
devhelp-devel
Red Hat:enterprise_linux:4::as
 before 0:0.10-0.4.el4
0:0.10-0.4.el4
seamonkey
Red Hat:enterprise_linux:4::as
 before 0:1.0.5-0.1.el4
0:1.0.5-0.1.el4
seamonkey-chat
Red Hat:enterprise_linux:4::as
 before 0:1.0.5-0.1.el4
0:1.0.5-0.1.el4
seamonkey-debuginfo
Red Hat:enterprise_linux:4::as
 before 0:1.0.5-0.1.el4
0:1.0.5-0.1.el4
seamonkey-devel
Red Hat:enterprise_linux:4::as
 before 0:1.0.5-0.1.el4
0:1.0.5-0.1.el4
seamonkey-dom-inspector
Red Hat:enterprise_linux:4::as
 before 0:1.0.5-0.1.el4
0:1.0.5-0.1.el4
seamonkey-js-debugger
Red Hat:enterprise_linux:4::as
 before 0:1.0.5-0.1.el4
0:1.0.5-0.1.el4
seamonkey-mail
Red Hat:enterprise_linux:4::as
 before 0:1.0.5-0.1.el4
0:1.0.5-0.1.el4
devhelp
Red Hat:enterprise_linux:4::desktop
 before 0:0.10-0.4.el4
0:0.10-0.4.el4
devhelp-debuginfo
Red Hat:enterprise_linux:4::desktop
 before 0:0.10-0.4.el4
0:0.10-0.4.el4
devhelp-devel
Red Hat:enterprise_linux:4::desktop
 before 0:0.10-0.4.el4
0:0.10-0.4.el4
seamonkey
Red Hat:enterprise_linux:4::desktop
 before 0:1.0.5-0.1.el4
0:1.0.5-0.1.el4
seamonkey-chat
Red Hat:enterprise_linux:4::desktop
 before 0:1.0.5-0.1.el4
0:1.0.5-0.1.el4
seamonkey-debuginfo
Red Hat:enterprise_linux:4::desktop
 before 0:1.0.5-0.1.el4
0:1.0.5-0.1.el4
seamonkey-devel
Red Hat:enterprise_linux:4::desktop
 before 0:1.0.5-0.1.el4
0:1.0.5-0.1.el4
seamonkey-dom-inspector
Red Hat:enterprise_linux:4::desktop
 before 0:1.0.5-0.1.el4
0:1.0.5-0.1.el4
seamonkey-js-debugger
Red Hat:enterprise_linux:4::desktop
 before 0:1.0.5-0.1.el4
0:1.0.5-0.1.el4
seamonkey-mail
Red Hat:enterprise_linux:4::desktop
 before 0:1.0.5-0.1.el4
0:1.0.5-0.1.el4
devhelp
Red Hat:enterprise_linux:4::es
 before 0:0.10-0.4.el4
0:0.10-0.4.el4
devhelp-debuginfo
Red Hat:enterprise_linux:4::es
 before 0:0.10-0.4.el4
0:0.10-0.4.el4
devhelp-devel
Red Hat:enterprise_linux:4::es
 before 0:0.10-0.4.el4
0:0.10-0.4.el4
seamonkey
Red Hat:enterprise_linux:4::es
 before 0:1.0.5-0.1.el4
0:1.0.5-0.1.el4
seamonkey-chat
Red Hat:enterprise_linux:4::es
 before 0:1.0.5-0.1.el4
0:1.0.5-0.1.el4
seamonkey-debuginfo
Red Hat:enterprise_linux:4::es
 before 0:1.0.5-0.1.el4
0:1.0.5-0.1.el4
seamonkey-devel
Red Hat:enterprise_linux:4::es
 before 0:1.0.5-0.1.el4
0:1.0.5-0.1.el4
seamonkey-dom-inspector
Red Hat:enterprise_linux:4::es
 before 0:1.0.5-0.1.el4
0:1.0.5-0.1.el4
seamonkey-js-debugger
Red Hat:enterprise_linux:4::es
 before 0:1.0.5-0.1.el4
0:1.0.5-0.1.el4
seamonkey-mail
Red Hat:enterprise_linux:4::es
 before 0:1.0.5-0.1.el4
0:1.0.5-0.1.el4
devhelp
Red Hat:enterprise_linux:4::ws
 before 0:0.10-0.4.el4
0:0.10-0.4.el4
devhelp-debuginfo
Red Hat:enterprise_linux:4::ws
 before 0:0.10-0.4.el4
0:0.10-0.4.el4
devhelp-devel
Red Hat:enterprise_linux:4::ws
 before 0:0.10-0.4.el4
0:0.10-0.4.el4
seamonkey
Red Hat:enterprise_linux:4::ws
 before 0:1.0.5-0.1.el4
0:1.0.5-0.1.el4
seamonkey-chat
Red Hat:enterprise_linux:4::ws
 before 0:1.0.5-0.1.el4
0:1.0.5-0.1.el4
seamonkey-debuginfo
Red Hat:enterprise_linux:4::ws
 before 0:1.0.5-0.1.el4
0:1.0.5-0.1.el4
seamonkey-devel
Red Hat:enterprise_linux:4::ws
 before 0:1.0.5-0.1.el4
0:1.0.5-0.1.el4
seamonkey-dom-inspector
Red Hat:enterprise_linux:4::ws
 before 0:1.0.5-0.1.el4
0:1.0.5-0.1.el4
seamonkey-js-debugger
Red Hat:enterprise_linux:4::ws
 before 0:1.0.5-0.1.el4
0:1.0.5-0.1.el4
seamonkey-mail
Red Hat:enterprise_linux:4::ws
 before 0:1.0.5-0.1.el4
0:1.0.5-0.1.el4
thunderbird
Red Hat:enterprise_linux:4::as
 before 0:1.5.0.7-0.1.el4
0:1.5.0.7-0.1.el4
thunderbird-debuginfo
Red Hat:enterprise_linux:4::as
 before 0:1.5.0.7-0.1.el4
0:1.5.0.7-0.1.el4
thunderbird
Red Hat:enterprise_linux:4::desktop
 before 0:1.5.0.7-0.1.el4
0:1.5.0.7-0.1.el4
thunderbird-debuginfo
Red Hat:enterprise_linux:4::desktop
 before 0:1.5.0.7-0.1.el4
0:1.5.0.7-0.1.el4
thunderbird
Red Hat:enterprise_linux:4::es
 before 0:1.5.0.7-0.1.el4
0:1.5.0.7-0.1.el4
thunderbird-debuginfo
Red Hat:enterprise_linux:4::es
 before 0:1.5.0.7-0.1.el4
0:1.5.0.7-0.1.el4
thunderbird
Red Hat:enterprise_linux:4::ws
 before 0:1.5.0.7-0.1.el4
0:1.5.0.7-0.1.el4
thunderbird-debuginfo
Red Hat:enterprise_linux:4::ws
 before 0:1.5.0.7-0.1.el4
0:1.5.0.7-0.1.el4

History

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

References

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