CVE-2026-6341
MEDIUM
NVD
CVSS Score
4.3
Severity
MEDIUM
Published
May 18, 2026
Vendor
unknown
Description
Mattermost Plugins versions <=11.5 11.1.5 10.13.11 11.3.4.0 fail to have API-level checks on which groups the user can create issues or attach comments to which allows a user that is member of multiple groups to create issues to a locked group via direct API requests. Mattermost Advisory ID: MMSA-2026-00602