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MEDIUM 4.3 Go

Mattermost fails to verify run_create permission for empty playbookId

GHSA-4pmx-622h-x359 · CVE-2026-26304 · GO-2026-4812

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Description

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

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