Site Isolation Issue in Firefox Reader Mode Component

CVE-2026-92068

What is CVE-2026-92068?

A site isolation issue has been identified in the Reader Mode component of Firefox, which could potentially allow for unauthorized access to sensitive data across different sites. This vulnerability has been addressed in the updates of Firefox version 156 and Firefox Extended Support Release (ESR) version 153.3. Users are strongly advised to update to these versions to ensure their security and privacy while using the browser.

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