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CVE-2006-2786

HTTP response smuggling vulnerability in Mozilla Firefox and Thunderbird before 1.5.0.4, when...

2.6 LowFix available

HTTP response smuggling vulnerability in Mozilla Firefox and Thunderbird before 1.5.0.4, when used with certain proxy servers, allows remote attackers to cause Firefox to interpret certain responses as if they were responses from two different sites via (1) invalid HTTP response headers with spaces between the header name and the colon, which might not be ignored in some cases, or (2) HTTP 1.1 headers through an HTTP 1.0 proxy, which are ignored by the proxy but processed by the client.

Exploit likelihood

1.77%Down 2.2 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 2.6

HTTP response smuggling vulnerability in Mozilla Firefox and Thunderbird before 1.5.0.4, when used with certain proxy servers, allows remote attackers to cause Firefox to interpret certain responses as if they were responses from two different sites via (1) invalid HTTP response headers with spaces between the header name and the colon, which might not be ignored in some cases, or (2) HTTP 1.1 headers through an HTTP 1.0 proxy, which are ignored by the proxy but processed by the client.

Record
CVE-2006-2786
CVSS 2.0
2.6 LowAV:N/AC:H/Au:N/C:N/I:P/A:N
Updated
2026-11-02
CVE List No score

HTTP response smuggling vulnerability in Mozilla Firefox and Thunderbird before 1.5.0.4, when used with certain proxy servers, allows remote attackers to cause Firefox to interpret certain responses as if they were responses from two different sites via (1) invalid HTTP response headers with spaces between the header name and the colon, which might not be ignored in some cases, or (2) HTTP 1.1 headers through an HTTP 1.0 proxy, which are ignored by the proxy but processed by the client.

Record
CVE-2006-2786
Updated
2026-11-02
EUVDEUVD-2006-2783 No score

HTTP response smuggling vulnerability in Mozilla Firefox and Thunderbird before 1.5.0.4, when used with certain proxy servers, allows remote attackers to cause Firefox to interpret certain responses as if they were responses from two different sites via (1) invalid HTTP response headers with spaces between the header name and the colon, which might not be ignored in some cases, or (2) HTTP 1.1 headers through an HTTP 1.0 proxy, which are ignored by the proxy but processed by the client.

Record
EUVD-2006-2783
Updated
2026-11-03
GitHub AdvisoriesGHSA-h93j-jrrw-xqfp No score

HTTP response smuggling vulnerability in Mozilla Firefox and Thunderbird before 1.5.0.4, when...

HTTP response smuggling vulnerability in Mozilla Firefox and Thunderbird before 1.5.0.4, when used with certain proxy servers, allows remote attackers to cause Firefox to interpret certain responses as if they were responses from two different sites via (1) invalid HTTP response headers with spaces between the header name and the colon, which might not be ignored in some cases, or (2) HTTP 1.1 headers through an HTTP 1.0 proxy, which are ignored by the proxy but processed by the client.

Record
GHSA-h93j-jrrw-xqfp
Updated
2026-11-02
OSV No score

HTTP response smuggling vulnerability in Mozilla Firefox and Thunderbird before 1.5.0.4, when used with certain proxy servers, allows remote attackers to cause Firefox to interpret certain responses as if they were responses from two different sites via (1) invalid HTTP response headers with spaces between the header name and the colon, which might not be ignored in some cases, or (2) HTTP 1.1 headers through an HTTP 1.0 proxy, which are ignored by the proxy but processed by the client.

Record
CVE-2006-2786
Updated
2026-11-02
OSVDEBIAN-CVE-2006-2786 No score

HTTP response smuggling vulnerability in Mozilla Firefox and Thunderbird before 1.5.0.4, when used with certain proxy servers, allows remote attackers to cause Firefox to interpret certain responses as if they were responses from two different sites via (1) invalid HTTP response headers with spaces between the header name and the colon, which might not be ignored in some cases, or (2) HTTP 1.1 headers through an HTTP 1.0 proxy, which are ignored by the proxy but processed by the client.

Record
DEBIAN-CVE-2006-2786
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
thunderbird
Debian:12
before 1.5.0.4-1
1.5.0.4-1
thunderbird
Debian:13
before 1.5.0.4-1
1.5.0.4-1
thunderbird
Debian:14
before 1.5.0.4-1
1.5.0.4-1
mozilla
Debian:3.1
From an advisory covering 14 CVEs
before 2:1.7.8-1sarge7.1, plus listed versions
2:1.7.8-12:1.7.8-1sarge12:1.7.8-1sarge22:1.7.8-1sarge32:1.7.8-1sarge52:1.7.8-1sarge62:1.7.8-1sarge7
2:1.7.8-1sarge7.1
mozilla-firefox
Debian:3.1
From an advisory covering 13 CVEs
before 1.0.4-2sarge9, plus listed versions
1.0.4-21.0.4-2sarge11.0.4-2sarge21.0.4-2sarge31.0.4-2sarge41.0.4-2sarge51.0.4-2sarge61.0.4-2sarge7
1.0.4-2sarge9
mozilla-thunderbird
Debian:3.1
From an advisory covering 15 CVEs
before 1.0.2-2.sarge1.0.8a, plus listed versions
1.0.2-21.0.2-2.sarge1.0.61.0.2-2.sarge1.0.71.0.2-2.sarge1.0.8
1.0.2-2.sarge1.0.8a
seamonkey
Red Hat:enterprise_linux:3::as
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-chat
Red Hat:enterprise_linux:3::as
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-debuginfo
Red Hat:enterprise_linux:3::as
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-devel
Red Hat:enterprise_linux:3::as
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
Show 96 moreShow less
Affected packages
PackageAffectedFixed
seamonkey-dom-inspector
Red Hat:enterprise_linux:3::as
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-js-debugger
Red Hat:enterprise_linux:3::as
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-mail
Red Hat:enterprise_linux:3::as
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-nspr
Red Hat:enterprise_linux:3::as
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-nspr-devel
Red Hat:enterprise_linux:3::as
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-nss
Red Hat:enterprise_linux:3::as
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-nss-devel
Red Hat:enterprise_linux:3::as
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey
Red Hat:enterprise_linux:3::desktop
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-chat
Red Hat:enterprise_linux:3::desktop
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-debuginfo
Red Hat:enterprise_linux:3::desktop
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-devel
Red Hat:enterprise_linux:3::desktop
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-dom-inspector
Red Hat:enterprise_linux:3::desktop
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-js-debugger
Red Hat:enterprise_linux:3::desktop
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-mail
Red Hat:enterprise_linux:3::desktop
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-nspr
Red Hat:enterprise_linux:3::desktop
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-nspr-devel
Red Hat:enterprise_linux:3::desktop
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-nss
Red Hat:enterprise_linux:3::desktop
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-nss-devel
Red Hat:enterprise_linux:3::desktop
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey
Red Hat:enterprise_linux:3::es
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-chat
Red Hat:enterprise_linux:3::es
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-debuginfo
Red Hat:enterprise_linux:3::es
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-devel
Red Hat:enterprise_linux:3::es
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-dom-inspector
Red Hat:enterprise_linux:3::es
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-js-debugger
Red Hat:enterprise_linux:3::es
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-mail
Red Hat:enterprise_linux:3::es
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-nspr
Red Hat:enterprise_linux:3::es
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-nspr-devel
Red Hat:enterprise_linux:3::es
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-nss
Red Hat:enterprise_linux:3::es
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-nss-devel
Red Hat:enterprise_linux:3::es
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey
Red Hat:enterprise_linux:3::ws
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-chat
Red Hat:enterprise_linux:3::ws
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-debuginfo
Red Hat:enterprise_linux:3::ws
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-devel
Red Hat:enterprise_linux:3::ws
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-dom-inspector
Red Hat:enterprise_linux:3::ws
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-js-debugger
Red Hat:enterprise_linux:3::ws
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-mail
Red Hat:enterprise_linux:3::ws
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-nspr
Red Hat:enterprise_linux:3::ws
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-nspr-devel
Red Hat:enterprise_linux:3::ws
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-nss
Red Hat:enterprise_linux:3::ws
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
seamonkey-nss-devel
Red Hat:enterprise_linux:3::ws
From an advisory covering 12 CVEs
before 0:1.0.2-0.1.0.EL3
0:1.0.2-0.1.0.EL3
devhelp
Red Hat:enterprise_linux:4::as
From an advisory covering 26 CVEs
before 0:0.10-0.2.el4
0:0.10-0.2.el4
devhelp-debuginfo
Red Hat:enterprise_linux:4::as
From an advisory covering 26 CVEs
before 0:0.10-0.2.el4
0:0.10-0.2.el4
devhelp-devel
Red Hat:enterprise_linux:4::as
From an advisory covering 26 CVEs
before 0:0.10-0.2.el4
0:0.10-0.2.el4
seamonkey
Red Hat:enterprise_linux:4::as
From an advisory covering 26 CVEs
before 0:1.0.3-0.el4.1
0:1.0.3-0.el4.1
seamonkey-chat
Red Hat:enterprise_linux:4::as
From an advisory covering 26 CVEs
before 0:1.0.3-0.el4.1
0:1.0.3-0.el4.1
seamonkey-debuginfo
Red Hat:enterprise_linux:4::as
From an advisory covering 26 CVEs
before 0:1.0.3-0.el4.1
0:1.0.3-0.el4.1
seamonkey-devel
Red Hat:enterprise_linux:4::as
From an advisory covering 26 CVEs
before 0:1.0.3-0.el4.1
0:1.0.3-0.el4.1
seamonkey-dom-inspector
Red Hat:enterprise_linux:4::as
From an advisory covering 26 CVEs
before 0:1.0.3-0.el4.1
0:1.0.3-0.el4.1
seamonkey-js-debugger
Red Hat:enterprise_linux:4::as
From an advisory covering 26 CVEs
before 0:1.0.3-0.el4.1
0:1.0.3-0.el4.1
seamonkey-mail
Red Hat:enterprise_linux:4::as
From an advisory covering 26 CVEs
before 0:1.0.3-0.el4.1
0:1.0.3-0.el4.1
devhelp
Red Hat:enterprise_linux:4::desktop
From an advisory covering 26 CVEs
before 0:0.10-0.2.el4
0:0.10-0.2.el4
devhelp-debuginfo
Red Hat:enterprise_linux:4::desktop
From an advisory covering 26 CVEs
before 0:0.10-0.2.el4
0:0.10-0.2.el4
devhelp-devel
Red Hat:enterprise_linux:4::desktop
From an advisory covering 26 CVEs
before 0:0.10-0.2.el4
0:0.10-0.2.el4
seamonkey
Red Hat:enterprise_linux:4::desktop
From an advisory covering 26 CVEs
before 0:1.0.3-0.el4.1
0:1.0.3-0.el4.1
seamonkey-chat
Red Hat:enterprise_linux:4::desktop
From an advisory covering 26 CVEs
before 0:1.0.3-0.el4.1
0:1.0.3-0.el4.1
seamonkey-debuginfo
Red Hat:enterprise_linux:4::desktop
From an advisory covering 26 CVEs
before 0:1.0.3-0.el4.1
0:1.0.3-0.el4.1
seamonkey-devel
Red Hat:enterprise_linux:4::desktop
From an advisory covering 26 CVEs
before 0:1.0.3-0.el4.1
0:1.0.3-0.el4.1
seamonkey-dom-inspector
Red Hat:enterprise_linux:4::desktop
From an advisory covering 26 CVEs
before 0:1.0.3-0.el4.1
0:1.0.3-0.el4.1
seamonkey-js-debugger
Red Hat:enterprise_linux:4::desktop
From an advisory covering 26 CVEs
before 0:1.0.3-0.el4.1
0:1.0.3-0.el4.1
seamonkey-mail
Red Hat:enterprise_linux:4::desktop
From an advisory covering 26 CVEs
before 0:1.0.3-0.el4.1
0:1.0.3-0.el4.1
devhelp
Red Hat:enterprise_linux:4::es
From an advisory covering 26 CVEs
before 0:0.10-0.2.el4
0:0.10-0.2.el4
devhelp-debuginfo
Red Hat:enterprise_linux:4::es
From an advisory covering 26 CVEs
before 0:0.10-0.2.el4
0:0.10-0.2.el4
devhelp-devel
Red Hat:enterprise_linux:4::es
From an advisory covering 26 CVEs
before 0:0.10-0.2.el4
0:0.10-0.2.el4
seamonkey
Red Hat:enterprise_linux:4::es
From an advisory covering 26 CVEs
before 0:1.0.3-0.el4.1
0:1.0.3-0.el4.1
seamonkey-chat
Red Hat:enterprise_linux:4::es
From an advisory covering 26 CVEs
before 0:1.0.3-0.el4.1
0:1.0.3-0.el4.1
seamonkey-debuginfo
Red Hat:enterprise_linux:4::es
From an advisory covering 26 CVEs
before 0:1.0.3-0.el4.1
0:1.0.3-0.el4.1
seamonkey-devel
Red Hat:enterprise_linux:4::es
From an advisory covering 26 CVEs
before 0:1.0.3-0.el4.1
0:1.0.3-0.el4.1
seamonkey-dom-inspector
Red Hat:enterprise_linux:4::es
From an advisory covering 26 CVEs
before 0:1.0.3-0.el4.1
0:1.0.3-0.el4.1
seamonkey-js-debugger
Red Hat:enterprise_linux:4::es
From an advisory covering 26 CVEs
before 0:1.0.3-0.el4.1
0:1.0.3-0.el4.1
seamonkey-mail
Red Hat:enterprise_linux:4::es
From an advisory covering 26 CVEs
before 0:1.0.3-0.el4.1
0:1.0.3-0.el4.1
devhelp
Red Hat:enterprise_linux:4::ws
From an advisory covering 26 CVEs
before 0:0.10-0.2.el4
0:0.10-0.2.el4
devhelp-debuginfo
Red Hat:enterprise_linux:4::ws
From an advisory covering 26 CVEs
before 0:0.10-0.2.el4
0:0.10-0.2.el4
devhelp-devel
Red Hat:enterprise_linux:4::ws
From an advisory covering 26 CVEs
before 0:0.10-0.2.el4
0:0.10-0.2.el4
seamonkey
Red Hat:enterprise_linux:4::ws
From an advisory covering 26 CVEs
before 0:1.0.3-0.el4.1
0:1.0.3-0.el4.1
seamonkey-chat
Red Hat:enterprise_linux:4::ws
From an advisory covering 26 CVEs
before 0:1.0.3-0.el4.1
0:1.0.3-0.el4.1
seamonkey-debuginfo
Red Hat:enterprise_linux:4::ws
From an advisory covering 26 CVEs
before 0:1.0.3-0.el4.1
0:1.0.3-0.el4.1
seamonkey-devel
Red Hat:enterprise_linux:4::ws
From an advisory covering 26 CVEs
before 0:1.0.3-0.el4.1
0:1.0.3-0.el4.1
seamonkey-dom-inspector
Red Hat:enterprise_linux:4::ws
From an advisory covering 26 CVEs
before 0:1.0.3-0.el4.1
0:1.0.3-0.el4.1
seamonkey-js-debugger
Red Hat:enterprise_linux:4::ws
From an advisory covering 26 CVEs
before 0:1.0.3-0.el4.1
0:1.0.3-0.el4.1
seamonkey-mail
Red Hat:enterprise_linux:4::ws
From an advisory covering 26 CVEs
before 0:1.0.3-0.el4.1
0:1.0.3-0.el4.1
firefox
Red Hat:enterprise_linux:4::as
From an advisory covering 24 CVEs
before 0:1.5.0.5-0.el4.1
0:1.5.0.5-0.el4.1
firefox-debuginfo
Red Hat:enterprise_linux:4::as
From an advisory covering 24 CVEs
before 0:1.5.0.5-0.el4.1
0:1.5.0.5-0.el4.1
firefox
Red Hat:enterprise_linux:4::desktop
From an advisory covering 24 CVEs
before 0:1.5.0.5-0.el4.1
0:1.5.0.5-0.el4.1
firefox-debuginfo
Red Hat:enterprise_linux:4::desktop
From an advisory covering 24 CVEs
before 0:1.5.0.5-0.el4.1
0:1.5.0.5-0.el4.1
firefox
Red Hat:enterprise_linux:4::es
From an advisory covering 24 CVEs
before 0:1.5.0.5-0.el4.1
0:1.5.0.5-0.el4.1
firefox-debuginfo
Red Hat:enterprise_linux:4::es
From an advisory covering 24 CVEs
before 0:1.5.0.5-0.el4.1
0:1.5.0.5-0.el4.1
firefox
Red Hat:enterprise_linux:4::ws
From an advisory covering 24 CVEs
before 0:1.5.0.5-0.el4.1
0:1.5.0.5-0.el4.1
firefox-debuginfo
Red Hat:enterprise_linux:4::ws
From an advisory covering 24 CVEs
before 0:1.5.0.5-0.el4.1
0:1.5.0.5-0.el4.1
thunderbird
Red Hat:enterprise_linux:4::as
From an advisory covering 25 CVEs
before 0:1.5.0.5-0.el4.1
0:1.5.0.5-0.el4.1
thunderbird-debuginfo
Red Hat:enterprise_linux:4::as
From an advisory covering 25 CVEs
before 0:1.5.0.5-0.el4.1
0:1.5.0.5-0.el4.1
thunderbird
Red Hat:enterprise_linux:4::desktop
From an advisory covering 25 CVEs
before 0:1.5.0.5-0.el4.1
0:1.5.0.5-0.el4.1
thunderbird-debuginfo
Red Hat:enterprise_linux:4::desktop
From an advisory covering 25 CVEs
before 0:1.5.0.5-0.el4.1
0:1.5.0.5-0.el4.1
thunderbird
Red Hat:enterprise_linux:4::es
From an advisory covering 25 CVEs
before 0:1.5.0.5-0.el4.1
0:1.5.0.5-0.el4.1
thunderbird-debuginfo
Red Hat:enterprise_linux:4::es
From an advisory covering 25 CVEs
before 0:1.5.0.5-0.el4.1
0:1.5.0.5-0.el4.1
thunderbird
Red Hat:enterprise_linux:4::ws
From an advisory covering 25 CVEs
before 0:1.5.0.5-0.el4.1
0:1.5.0.5-0.el4.1
thunderbird-debuginfo
Red Hat:enterprise_linux:4::ws
From an advisory covering 25 CVEs
before 0:1.5.0.5-0.el4.1
0:1.5.0.5-0.el4.1

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
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Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2006-2786 is a low vulnerability (CVSS 2.6) in Mozilla Firefox, published June 2, 2006. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.77%, the 78th percentile. Fixed in thunderbird 1.5.0.4-1.

References

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