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CVE-2026-3471

MEDIUM CVSS: 6.5 Published: 2026-05-18 Modified: 2026-06-17

Description

Mattermost Desktop App versions <=6.1 6.0.1 5.4.13.0 fail to prevent an invalid URL from loading in a pop-up window in the Mattermost Desktop App which allows a malicious server owner to repeated crash the application via calling {{window.open('javascript:alert()');}}. Mattermost Advisory ID: MMSA-2026-00618

Affected Platforms

Mattermost Mattermost Desktop

Weakness Type

CWE-939

References