Mitigation Bypass in Firefox File Handling Component
CVE-2026-124940

Currently unrated

Key Information:

Vendor: Mozilla
Status: Firefox
Vendor: CVE Published:; 10 November 2026

What is CVE-2026-124940?

A mitigation bypass was discovered in the File Handling component of Firefox, which could allow unintended access to file handling functionalities. This issue has been addressed in Firefox version 160 and Firefox ESR version 153.7, ensuring improved security measures are in place to protect users from potential exploits related to file handling.