CVE-2026-16046
MEDIUM
NVD
CVSS Score
4.3
Severity
MEDIUM
Published
Aug 17, 2026
Vendor
unknown
Description
Mattermost versions 11.7.x <= 11.7.6, 10.11.x <= 10.11.21 fail to enforce run-state validation on write operations for finished playbook runs which allows a run participant to modify status, checklists, retrospective content, ownership, and participants on completed runs via REST and GraphQL API requests. Mattermost Advisory ID: MMSA-2026-00675