Vulnerability Details CVE-2026-16046
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
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 4.9%
CVSS Severity
CVSS v3 Score 4.3
References
Products affected by CVE-2026-16046
-
cpe:2.3:a:mattermost:mattermost_server:11.7.0
-
cpe:2.3:a:mattermost:mattermost_server:11.7.1
-
cpe:2.3:a:mattermost:mattermost_server:11.7.2
-
cpe:2.3:a:mattermost:mattermost_server:11.7.3
-
cpe:2.3:a:mattermost:mattermost_server:11.7.4
-
cpe:2.3:a:mattermost:mattermost_server:11.7.5
-
cpe:2.3:a:mattermost:mattermost_server:11.7.6