PT-2026-84189 · Mozilla · Firefox+2

Apentota

·

CVE-2026-84136

·

Published

2026-09-01

·

Updated

2026-09-05

CVSS v3.1

9.8

Critical

VectorAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Name of the Vulnerable Software and Affected Versions Firefox versions prior to 155 Firefox ESR versions prior to 153.2 Thunderbird versions prior to 155 Thunderbird versions prior to 153.2
Description An issue exists within the Document Object Model (DOM) specifically affecting the Navigation component.
Recommendations Update Firefox to version 155. Update Firefox ESR to version 153.2. Update Thunderbird to version 155. Update Thunderbird to version 153.2.

Fix

XSS

Information Disclosure

Found an issue in the description? Have something to add? Feel free to write us 👾
dbugs@ptsecurity.com

Weakness Enumeration

CWE-79CWE-200

Related Identifiers

CVE-2026-84136
OPENSUSE-SU-2026:11666-1
OPENSUSE-SU-2026:11677-1

Affected Products

Firefox
Firefox Esr
Thunderbird