Mozilla · Firefox · CVE-2026-12298
**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 that could lead to instability or unauthorized actions by improperly handling memory operations.
**Recommendations**
Update to version 152
Update to version 140.12
Update to version 152
Update to version 140.12