CVE-2026-4055
MEDIUM
NVD
CVSS Score
4.3
Severity
MEDIUM
Published
May 21, 2026
Vendor
unknown
Description
Mattermost versions 11.5.x <= 11.5.1 fail to validate team-level run_create permission against the target team when creating a playbook run which allows an authenticated team member to create runs in teams where they lack permission via specifying a different team ID in the run creation API request. Mattermost Advisory ID: MMSA-2026-00629