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CVE-2026-8683

MEDIUM CVSS: 6.5 Published: 2026-06-15 Modified: 2026-06-17

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

Affected Platforms

Mattermost Mattermost Desktop

Weakness Type

CWE-770

References