Mozilla · Thunderbird · CVE-2026-12329
**Name of the Vulnerable Software and Affected Versions**
Thunderbird versions prior to 140.12
Firefox ESR versions prior to 140.12
**Description**
A memory safety bug exists in the software, which could lead to instability or unexpected behavior when handling memory operations.
**Recommendations**
Update to version 140.12 for Thunderbird.
Update to version 140.12 for Firefox ESR.