Mozilla · Thunderbird · CVE-2026-7321
**Name of the Vulnerable Software and Affected Versions**
Firefox versions prior to 150
Thunderbird versions prior to 150
Firefox ESR versions prior to 140.10.1
**Description**
A sandbox escape exists in the WebRTC: Networking component caused by incorrect boundary conditions. A sandbox is a security mechanism used to separate running programs from the rest of the system to prevent malicious code from accessing sensitive data or resources.
**Recommendations**
Update Firefox to version 150.
Update Thunderbird to version 150.
Update Firefox ESR to version 140.10.1.