PT-2026-76988 · Mozilla · Firefox+2

·

CVE-2026-74955

·

Published

2026-08-18

·

Updated

2026-08-31

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 154 Firefox ESR versions prior to 153.1 Thunderbird versions prior to 154 Thunderbird versions prior to 153.1
Description Privilege escalation exists in the Request Handling component.
Recommendations Update Firefox to version 154. Update Firefox ESR to version 153.1. Update Thunderbird to version 154. Update Thunderbird to version 153.1.

Fix

LPE

Improper Privilege Management

Found an issue in the description? Have something to add? Feel free to write us 👾

Weakness Enumeration

Related Identifiers

CVE-2026-74955
OPENSUSE-SU-2026:11546-1
OPENSUSE-SU-2026:11580-1
OPENSUSE-SU-2026:21713-1
SUSE-SU-2026:23411-1
SUSE-SU-2026:3658-1
SUSE-SU-2026:3683-1

Affected Products

Firefox
Firefox Esr
Thunderbird