PT-2026-84191 · Mozilla · Firefox+1

CVE-2026-84138

Published

2026-09-01

Updated

2026-09-04

CVSS v3.1

7.5

High

Vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 155 Thunderbird versions prior to 155

Description A denial-of-service issue exists within the PDF Viewer component.

Recommendations Update Firefox to version 155. Update Thunderbird to version 155.

Fix

DoS

Resource Exhaustion

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

CVE-2026-84138

OPENSUSE-SU-2026:11677-1

Firefox

Thunderbird