VULNERABILITY INTELLIGENCE

CVE-2026-1628

CVSS score4.6 MEDIUM
EPSS probability0.16%
CISA KEVNot currently listed
Published2026-03-02
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N

Description

Mattermost Desktop App versions <=5.13.3 fail to attach listeners restricting navigation to external sites within the Mattermost app which allows a malicious server to expose preload script functionality to untrusted servers via having a user open an external link in their Mattermost server. Mattermost Advisory ID: MMSA-2026-00596

Weakness classification

  • responsibledisclosure@mattermost.com: CWE-829

Primary references