Sandbox Escape Vulnerability in Firefox Profile Backup Component

CVE-2026-8401

What is CVE-2026-8401?

A vulnerability has been identified in the Profile Backup component of Firefox, allowing an attacker to escape the restricted environment of the browser. This sandbox escape could enable malicious actors to gain unauthorized access to sensitive data or perform unintended actions within a user’s system. The vulnerability has been addressed in Firefox version 150.0.3, which mitigates the risk associated with this issue. Users are encouraged to update to the latest version to ensure their protection against potential exploits.

References