PT-2026-61878 · Mozilla · Firefox+1

·

CVE-2026-16366

·

Published

2026-07-21

·

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 153 Thunderbird versions prior to 153
Description A privilege escalation issue exists within the DOM Navigation component.
Recommendations Update Firefox to version 153. Update Thunderbird to version 153.

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-2026-16366
OPENSUSE-SU-2026:11358-1
OPENSUSE-SU-2026:11373-1
OPENSUSE-SU-2026:21713-1
SUSE-SU-2026:23411-1

Affected Products

Firefox
Thunderbird