Mozilla · Thunderbird · CVE-2026-8958
**Name of the Vulnerable Software and Affected Versions**
Firefox versions prior to 151
Firefox ESR versions prior to 140.11
Thunderbird versions prior to 151
Thunderbird versions prior to 140.11
**Description**
An issue in the Security: Process Sandboxing component allows for information disclosure and sandbox escape. A sandbox is a security mechanism for separating running programs, ensuring that code in one process cannot access memory or resources of another.
**Recommendations**
Update to version 151
Update to version 140.11
Update to version 151
Update to version 140.11