CVE-2026-74961

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 A side-channel issue exists within the Web Audio component. A side-channel is a method of extracting information from a system by observing its physical implementation, such as timing or power consumption, rather than exploiting a direct flaw in the code.

Recommendations Update Firefox to version 154. Update Firefox ESR to version 153.1. Update Thunderbird to version 154. Update Thunderbird to version 153.1.