Mozilla · Firefox · CVE-2026-74958
**Name of the Vulnerable Software and Affected Versions**
Firefox versions prior to 154
Firefox ESR versions prior to 153.1
Thunderbird versions prior to 154
Thunderbird versions prior to 153.1
**Description**
An information disclosure issue exists within the WebRTC component, which is a framework that enables real-time communication (voice, video, and data) between browsers.
**Recommendations**
Update Firefox to version 154.
Update Firefox ESR to version 153.1.
Update Thunderbird to version 154.
Update Thunderbird to version 153.1.