Mitigation Bypass Vulnerability in Firefox by Mozilla

CVE-2026-109763

What is CVE-2026-109763?

A mitigation bypass vulnerability has been identified in the File Handling component of Mozilla Firefox. This issue can lead to potential exploitation if left unaddressed. The vulnerability affects Firefox versions prior to 158 and Firefox ESR versions prior to 153.5. Users are strongly advised to upgrade to the latest versions to ensure their systems are secure against potential threats.

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