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Fencer Vulns
critical 9.3

CVE-2009-1838 json

The garbage-collection implementation in Mozilla Firefox before 3.0.11, Thunderbird before 2.0.0.22, and SeaMonkey before 1.1.17 sets an el…

published 2009-06-12 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-1833

cvss
9.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.8%
EPSS 4.8% chance of exploitation in 30 days, percentile 92%
public exploits
0
none known

Summary

The garbage-collection implementation in Mozilla Firefox before 3.0.11, Thunderbird before 2.0.0.22, and SeaMonkey before 1.1.17 sets an element's owner document to null in unspecified circumstances, which allows remote attackers to execute arbitrary JavaScript with chrome privileges via a crafted event handler, related to an incorrect context for this event handler.

Patch / fix

  • thunderbird RHEL 5 PRODUCTIVITY, RHEL 5 2.0.0.22-2.el5_3
  • thunderbird RHEL 4 1.5.0.12-23.el4
  • seamonkey RHEL 3 1.0.9-0.38.el3
  • seamonkey RHEL 4 1.0.9-43.el4_8
  • seamonkey-nss RHEL 3 1.0.9-0.38.el3
  • seamonkey-chat RHEL 3 1.0.9-0.38.el3
  • seamonkey-chat RHEL 4 1.0.9-43.el4_8
  • seamonkey-mail RHEL 3 1.0.9-0.38.el3

red hat advisories RHSA-2009:1126RHSA-2009:1125RHSA-2009:1096RHSA-2009:1095

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2009-1838 updated cvss 6.8

Firefox arbitrary code execution flaw

  • Red Hat Desktop version 3 seamonkey 1.0.9-0.38.el3, seamonkey-nss 1.0.9-0.38.el3, seamonkey-chat 1.0.9-0.38.el3, seamonkey-mail 1.0.9-0.38.el3, seamonkey-nspr 1.0.9-0.38.el3, seamonkey-js-debugger 1.0.9-0.38.el3, +1 more
    fixed: vendor fix RHSA-2009:1096
  • Red Hat Enterprise Linux (v. 5 server) firefox 3.0.11-2.el5_3, xulrunner 1.9.0.11-3.el5_3, xulrunner-devel-unstable 1.9.0.11-3.el5_3
    fixed: vendor fix RHSA-2009:1095
  • Red Hat Enterprise Linux AS version 3 seamonkey 1.0.9-0.38.el3, seamonkey-nss 1.0.9-0.38.el3, seamonkey-chat 1.0.9-0.38.el3, seamonkey-mail 1.0.9-0.38.el3, seamonkey-nspr 1.0.9-0.38.el3, seamonkey-js-debugger 1.0.9-0.38.el3, +1 more Red Hat Enterprise Linux AS version 4 firefox 3.0.11-4.el4, seamonkey 1.0.9-43.el4_8, thunderbird 1.5.0.12-23.el4, seamonkey-chat 1.0.9-43.el4_8, seamonkey-mail 1.0.9-43.el4_8, seamonkey-js-debugger 1.0.9-43.el4_8, +1 more
    fixed: vendor fix RHSA-2009:1096
  • Red Hat Enterprise Linux Desktop (v. 5 client) firefox 3.0.11-2.el5_3, xulrunner 1.9.0.11-3.el5_3, thunderbird 2.0.0.22-2.el5_3, xulrunner-devel-unstable 1.9.0.11-3.el5_3
    fixed: vendor fix RHSA-2009:1095
  • Red Hat Enterprise Linux Desktop version 4 firefox 3.0.11-4.el4, seamonkey 1.0.9-43.el4_8, thunderbird 1.5.0.12-23.el4, seamonkey-chat 1.0.9-43.el4_8, seamonkey-mail 1.0.9-43.el4_8, seamonkey-js-debugger 1.0.9-43.el4_8, +1 more
    fixed: vendor fix RHSA-2009:1096
  • Red Hat Enterprise Linux Desktop Workstation (v. 5 client) xulrunner 1.9.0.11-3.el5_3, xulrunner-devel-unstable 1.9.0.11-3.el5_3
    fixed: vendor fix RHSA-2009:1095
  • Red Hat Enterprise Linux ES version 3 seamonkey 1.0.9-0.38.el3, seamonkey-nss 1.0.9-0.38.el3, seamonkey-chat 1.0.9-0.38.el3, seamonkey-mail 1.0.9-0.38.el3, seamonkey-nspr 1.0.9-0.38.el3, seamonkey-js-debugger 1.0.9-0.38.el3, +1 more Red Hat Enterprise Linux ES version 4 firefox 3.0.11-4.el4, seamonkey 1.0.9-43.el4_8, thunderbird 1.5.0.12-23.el4, seamonkey-chat 1.0.9-43.el4_8, seamonkey-mail 1.0.9-43.el4_8, seamonkey-js-debugger 1.0.9-43.el4_8, +1 more
    fixed: vendor fix RHSA-2009:1096
  • Red Hat Enterprise Linux Optional Productivity Applications (v. 5 server) thunderbird 2.0.0.22-2.el5_3
    fixed: vendor fix RHSA-2009:1126
show 1 more
  • Red Hat Enterprise Linux WS version 3 seamonkey 1.0.9-0.38.el3, seamonkey-nss 1.0.9-0.38.el3, seamonkey-chat 1.0.9-0.38.el3, seamonkey-mail 1.0.9-0.38.el3, seamonkey-nspr 1.0.9-0.38.el3, seamonkey-js-debugger 1.0.9-0.38.el3, +1 more Red Hat Enterprise Linux WS version 4 firefox 3.0.11-4.el4, seamonkey 1.0.9-43.el4_8, thunderbird 1.5.0.12-23.el4, seamonkey-chat 1.0.9-43.el4_8, seamonkey-mail 1.0.9-43.el4_8, seamonkey-js-debugger 1.0.9-43.el4_8, +1 more
    fixed: vendor fix RHSA-2009:1096

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

4.79% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 9.3 AV:N/AC:M/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-94 Improper Control of Generation of Code

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.