Mitigation Bypass in DOM Security Component of Firefox

CVE-2026-100829

What is CVE-2026-100829?

A vulnerability has been identified in the DOM security component of Firefox, which allows for a bypass of established mitigations. This loophole poses significant risks as it could enable adversaries to exploit weaknesses in the browser's security frameworks. Mozilla has issued patches in Firefox ESR 153.4 and Firefox 157 to address this issue. Users are strongly encouraged to update to these versions to maintain a secure browsing environment and protect against potential threats.

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