CVE-2006-4565

Heap-based buffer overflow in Mozilla Firefox before 1.5.0.7, Thunderbird before 1.5.0.7, and...

9.3 HighFix available

Heap-based buffer overflow in 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) and possibly execute arbitrary code via a JavaScript regular expression with a "minimal quantifier."

Exploit likelihood

6.17%Down 0.4 points since Feb 4, 2022

What each source reports

NVD Score used 9.3

Record: CVE-2006-4565
CVSS 2.0: 9.3 HighAV:N/AC:M/Au:N/C:C/I:C/A:C
Weakness: CWE-119
Updated: 2026-11-02

CVE List No score

Record: CVE-2006-4565
Updated: 2026-11-02

EUVDEUVD-2006-4553 No score

Record: EUVD-2006-4553
Updated: 2026-11-03

GitHub AdvisoriesGHSA-xr4c-88wp-frr7 No score

Heap-based buffer overflow in Mozilla Firefox before 1.5.0.7, Thunderbird before 1.5.0.7, and...

Record: GHSA-xr4c-88wp-frr7
Weakness: CWE-119
Updated: 2026-11-02

OSV No score

Record: CVE-2006-4565
Updated: 2026-11-02

OSVDEBIAN-CVE-2006-4565 No score

Record: DEBIAN-CVE-2006-4565
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`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
Package	Affected	Fixed
`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
Recorded	Changed	Sources
Nov 3, 2026	affected
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

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

In short

CVE-2006-4565 is a high vulnerability (CVSS 9.3) 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 6.17%, the 93rd percentile. Fixed in thunderbird 1.5.0.7-1.

References

Show 100 moreShow less