CVE-2026-16046 — Missing run-state validation on finished playbook runs
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 m…
Published: 2026-08-17 · CVSS: 3.5 · CVSS 3.1
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
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7