Mitigation Bypass in Firefox File Handling Component

CVE-2026-6763

What is CVE-2026-6763?

A mitigation bypass vulnerability exists within the File Handling component of Firefox, allowing potential exploitation. This issue can lead to unintended file handling behavior, creating security risks for users. Mozilla has addressed this issue in version 150 of Firefox and in the ESR version 140.10, reverting to the safe handling of files to safeguard user privacy and security. It is crucial for users to update to the latest versions to mitigate exposure to this vulnerability.

References