Mozilla · Firefox Esr · CVE-2026-92079
**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**
A mitigation bypass exists within the Widget: Win32 component.
**Recommendations**
Update Firefox to version 156.
Update Firefox ESR to version 153.3.
Update Thunderbird to version 156.
Update Thunderbird to version 153.3.