Mozilla · Firefox · CVE-2026-12312
**Name of the Vulnerable Software and Affected Versions**
Firefox versions prior to 152
Firefox ESR versions prior to 140.12
Thunderbird versions prior to 152
Thunderbird versions prior to 140.12
**Description**
A memory safety bug exists in the software, which could lead to unexpected behavior or crashes when handling memory operations.
**Recommendations**
Update Firefox to version 152.
Update Firefox ESR to version 140.12.
Update Thunderbird to version 152.
Update Thunderbird to version 140.12.