Information Disclosure in Firefox by Mozilla

CVE-2026-74971

What is CVE-2026-74971?

A security vulnerability exists in the DOM related to UI Events and Focus Handling within Firefox. This flaw could potentially allow unauthorized access to sensitive information contained within the browser's Document Object Model (DOM). The issue affects specific versions of Firefox and has been addressed in subsequent updates, including Firefox 154 and Firefox ESR versions 140.14 and 153.1. Users are strongly encouraged to update their browsers to mitigate any risks associated with this vulnerability.

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