VULNERABILITY INTELLIGENCE

CVE-2026-9812

CVSS score6.5 MEDIUM
EPSS probability0.37%
CISA KEVNot currently listed
Published2026-09-14
Last modified2026-10-06
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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 that a property field belongs to the specified run before updating its value which allows an authenticated user with run property-management access to crash the Playbooks plugin via a REST request referencing a property field that belongs to a different run. Mattermost Advisory ID: MMSA-2026-00684

Weakness classification

  • responsibledisclosure@mattermost.com: CWE-639

Primary references