PT-2026-49243 · Mattermost · Mattermost Desktop App

Game0V3R

·

CVE-2026-8683

·

Published

2026-06-15

·

Updated

2026-06-16

CVSS v3.1

6.5

Medium

VectorAV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Name of the Vulnerable Software and Affected Versions Mattermost Desktop App versions prior to 6.1 Mattermost Desktop App version 5.5.13.0
Description The application fails to properly handle attempts to open extremely long URLs. A malicious server owner can cause the application to crash by including a script that calls the window.open() function with an excessively large URL.
Recommendations Update Mattermost Desktop App versions prior to 6.1 to a newer version. Update Mattermost Desktop App version 5.5.13.0 to a newer version.

Exploit

Fix

DoS

Allocation of Resources Without Limits

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

Weakness Enumeration

CWE-770

Related Identifiers

CVE-2026-8683

Affected Products

Mattermost Desktop App