CVE-2026-8683
MEDIUM
NVD
CVSS Score
6.5
Severity
MEDIUM
Published
Jun 15, 2026
Vendor
unknown
Description
Mattermost Desktop App versions <=6.1 5.5.13.0 fail to account for attempting to open extremely long URLs in the Mattermost Desktop App which allows a malicious server owner to crash the application via including a script to call window.open on a very large URL. Mattermost Advisory ID: MMSA-2026-00652