VULNERABILITY INTELLIGENCE

CVE-2026-10542

CVSS score5 MEDIUM
EPSS probability0.12%
CISA KEVNot currently listed
Published2026-09-14
Last modified2026-10-07
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L

Description

Mattermost versions 11.9.x <= 11.9.0, 11.8.x <= 11.8.4, 11.7.x <= 11.7.7, 10.11.x <= 10.11.22 fail to validate channel action ownership which allows channel managers to update actions in other channels via the channel action update endpoint.. Mattermost Advisory ID: MMSA-2026-00692

Weakness classification

  • responsibledisclosure@mattermost.com: CWE-639

Primary references