Mozilla · Firefox · CVE-2026-6753
**Name of the Vulnerable Software and Affected Versions**
Firefox versions prior to 150
Firefox ESR versions prior to 140.10
Thunderbird versions prior to 150
Thunderbird versions prior to 140.10
**Description**
Incorrect boundary conditions exist in the WebRTC component, which is a framework that enables real-time communication (voice, video, and data) within web browsers.
**Recommendations**
Update Firefox to version 150.
Update Firefox ESR to version 140.10.
Update Thunderbird to version 150.
Update Thunderbird to version 140.10.