Mozilla · Thunderbird · CVE-2026-12327
**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 ESR versions prior to 140.12
**Description**
Memory safety bugs involving memory corruption may allow the execution of arbitrary code.
**Recommendations**
Update Firefox to version 152.
Update Firefox ESR to version 140.12.
Update Thunderbird to version 152.
Update Thunderbird ESR to version 140.12.