CVEvulnerability

CVE-2026-3471

6.5 MEDIUM Published 2026-05-18 Modified 2026-06-17 Official page ↗
Status
Analyzed
Published
2026-05-18
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weaknesses
CWE-939

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 configurations

• mattermost mattermost desktop (<= 5.4.13.0) • mattermost mattermost desktop (>= 6.0.0 <= 6.0.1) • mattermost mattermost desktop (>= 6.1.0 < 6.2.0)

Related

Weakness · CWE (1)

  • CWE-939 Improper Authorization in Handler for Custom URL Scheme weakness

References