PT-2026-111477 · Mozilla · Firefox+2

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CVE-2026-109756

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Published

2026-10-13

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Updated

2026-10-13

CVSS v3.1

8.8

High

VectorAV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Name of the Vulnerable Software and Affected Versions Firefox versions prior to 158 Firefox ESR versions prior to 153.5 Thunderbird versions prior to 158 Thunderbird versions prior to 153.5
Description Privilege escalation exists within the DOM: Navigation component.
Recommendations Update Firefox to version 158. Update Firefox ESR to version 153.5. Update Thunderbird to version 158. Update Thunderbird to version 153.5.

Fix

Improper Privilege Management

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Weakness Enumeration

Related Identifiers

CVE-2026-109756

Affected Products

Firefox
Firefox Esr
Thunderbird