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Mattermost doesn't check if {{team_id}} was being changed when updating playbooks

🗓️ 18 May 2026 09:31:48Reported by GitHub Advisory DatabaseType 
github
 github
🔗 github.com👁 4 Views

Mattermost fails to validate team_id on playbook updates, enabling changes by users with Manage Playbook Configurations.

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01 Jun 2026 15:19Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.13.1 - 4.3
EPSS0.00031
SSVC
4