Information Disclosure in Mozilla Firefox and Firefox ESR

CVE-2026-109767

What is CVE-2026-109767?

An information disclosure vulnerability has been identified in the Networking component of the Mozilla Firefox browser. This flaw could potentially expose sensitive data to unauthorized access. The issue has been addressed in Firefox version 158 and Firefox ESR version 153.5, underscoring the importance of updating to these versions to ensure continued security and protection against data leaks.

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