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 4.7%
CVSS Severity
CVSS v3 Score 4.3
References
Products affected by CVE-2026-16046
-
cpe:2.3:a:mattermost:mattermost_server:10.11.0
-
cpe:2.3:a:mattermost:mattermost_server:10.11.1
-
cpe:2.3:a:mattermost:mattermost_server:10.11.10
-
cpe:2.3:a:mattermost:mattermost_server:10.11.11
-
cpe:2.3:a:mattermost:mattermost_server:10.11.12
-
cpe:2.3:a:mattermost:mattermost_server:10.11.13
-
cpe:2.3:a:mattermost:mattermost_server:10.11.14
-
cpe:2.3:a:mattermost:mattermost_server:10.11.15
-
cpe:2.3:a:mattermost:mattermost_server:10.11.16
-
cpe:2.3:a:mattermost:mattermost_server:10.11.17
-
cpe:2.3:a:mattermost:mattermost_server:10.11.18
-
cpe:2.3:a:mattermost:mattermost_server:10.11.19
-
cpe:2.3:a:mattermost:mattermost_server:10.11.2
-
cpe:2.3:a:mattermost:mattermost_server:10.11.20
-
cpe:2.3:a:mattermost:mattermost_server:10.11.21
-
cpe:2.3:a:mattermost:mattermost_server:10.11.3
-
cpe:2.3:a:mattermost:mattermost_server:10.11.4
-
cpe:2.3:a:mattermost:mattermost_server:10.11.5
-
cpe:2.3:a:mattermost:mattermost_server:10.11.6
-
cpe:2.3:a:mattermost:mattermost_server:10.11.7
-
cpe:2.3:a:mattermost:mattermost_server:10.11.8
-
cpe:2.3:a:mattermost:mattermost_server:10.11.9
-
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