CVE-2026-6747

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 A use-after-free issue exists in the WebRTC component. Use-after-free occurs when an application continues to use a pointer after it has been freed, which can lead to crashes or arbitrary code execution.

Recommendations Update Firefox to version 150 or later. Update Firefox ESR to version 140.10 or later. Update Thunderbird to version 150 or later. Update Thunderbird to version 140.10 or later.