CVE-2026-8401

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 150.0.3 Firefox ESR versions prior to 115.36 Firefox ESR versions prior to 140.11

Description A sandbox escape exists in the Profile Backup component. A sandbox is a security mechanism for separating running programs, ensuring that code in a sandbox cannot access resources outside of it.

Recommendations Update to version 150.0.3. Update to ESR version 115.36. Update to ESR version 140.11.