CVE-2026-92042

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 156 Firefox ESR versions prior to 153.3 Thunderbird versions prior to 156 Thunderbird versions prior to 153.3

Description A race condition exists within the DOM: Content Processes component. A race condition is a situation where the system's substantive behavior is dependent on the sequence or timing of other uncontrollable events.

Recommendations Update Firefox to version 156. Update Firefox ESR to version 153.3. Update Thunderbird to version 156. Update Thunderbird to version 153.3.