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, 23:44 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
Apply the Thunderbird update to version 115.12.1 provided by Red Hat for the affected Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions. Restart all running Thunderbird instances after applying the update to ensure the fixes take effect. Refer to Red Hat's official update article for detailed instructions. No additional mitigation steps are indicated by the vendor advisory.
Description
Multiple security vulnerabilities affecting Mozilla Thunderbird were addressed in an update to version 115.12.1. These include use-after-free bugs in networking and JavaScript object transplant, timing attacks leaking external protocol handlers, sandbox bypasses by iframes, cross-origin image leaks via Offscreen Canvas, and memory corruption in text fragments. The update fixes these issues to improve memory safety and sandbox enforcement.
References
- access.redhat.com/errata/RHSA-2024:4015 (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_4015.json (opens in a new tab)