VULNERABILITY INTELLIGENCE

CVE-2026-8683

CVSS score6.5 MEDIUM
EPSS probability0.20%
CISA KEVNot currently listed
Published2026-06-15
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

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

Weakness classification

  • responsibledisclosure@mattermost.com: CWE-770

Primary references