GHSA-4pmx-622h-x359

ghsaUSosv

Mattermost fails to verify run_create permission for empty playbookId

view advisory published 2026-03-16Licence: CC-BY-4.0

Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2 fail to verify run_create permission for empty playbookId, which allows team members to create unauthorized runs via the playbook run API. Mattermost Advisory ID: MMSA-2025-00542

describes (1)

Related CVEs.

ID	severity	EPSS	exploitable	published
CVE-2026-26304US	—OT elevated	0.17% (6th)	—	2026-03-16
Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2 fail to verify run_create permission for empty playbookId, which allows team members to create unauthorized runs via the play…

references

External citations — patches, advisories, analysis.

https://github.com/mattermost/mattermost-plugin-playbooksPACKAGE
https://github.com/mattermost/mattermost-plugin-playbooks/commit/705f54a818410f3612df3865bfde608ed471037eWEB
https://mattermost.com/security-updatesWEB
https://nvd.nist.gov/vuln/detail/CVE-2026-26304ADVISORY

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