medium4.3
CVE-2026-26304
Mattermost fails to verify run_create permission for empty playbookId
Impact
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
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/mattermost/mattermost-plugin-playbooks | < 1.41.1-0.20260316224925-705f54a81841 | 1.41.1-0.20260316224925-705f54a81841 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Mattermost | Mattermost Server | from 11.2.0 before 11.2.3 from 11.3.0 before 11.3.1 |