CVE-2026-92065

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 156 Firefox ESR versions prior to 153.3 Thunderbird versions prior to 156 Thunderbird versions prior to 153.3

Description Incorrect boundary conditions in the Widget: Win32 component allow for a sandbox escape. A sandbox is a security mechanism used to isolate running applications from the rest of the system to prevent malicious code from accessing sensitive data or resources.

Recommendations Update Firefox to version 156. Update Firefox ESR to version 153.3. Update Thunderbird to version 156. Update Thunderbird to version 153.3.