Red Hat Security Advisory: thunderbird security update
Affects Red Hat thunderbirdSource GCVE Database
Mentioned vulnerabilities
Not known to be exploited · fixed in Red Hat package updates : patch Red Hat thunderbird soon.
Data as of 3 Nov 2026, 23:49 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
- Patch
- Available – fixed in 115.12.1
Exploitation evidence
Disclosed: evidence found.
CVE published 20 Jun 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 3 Nov 2026.
What to do
AI-suggested
A security update to Thunderbird version 115.12.1 is available from Red Hat for affected Red Hat Enterprise Linux 9.2 Extended Update Support and related variants. Users should apply this update promptly and restart all running instances of Thunderbird for the fixes to take effect. No additional mitigation steps are indicated by the vendor advisory.
Description
Multiple security vulnerabilities have been identified and fixed in Mozilla Thunderbird, addressed in the update to version 115.12.1. These include use-after-free bugs in networking and JavaScript object transplant, a timing attack leaking external protocol handlers, sandbox bypass via iframes, cross-origin image leaks, and memory corruption issues. The update is rated as important by Red Hat and applies to Red Hat Enterprise Linux 9.2 Extended Update Support and related variants. Users must apply the update and restart Thunderbird to mitigate these issues.
References
- access.redhat.com/errata/RHSA-2024:4004 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2291394 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2291395 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2291396 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2291397 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2291399 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2291400 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2291401 (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2024/rhsa-2024_4004.json (opens in a new tab)