CVE-2026-4286
Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to check if {{team_id}} was being changed when updating playbooks, allowing users with only {{Manage Playbook Configurations}} permission to change a playbook's team, bypassing manage members restriction via PUT api. Mattermost Advisory ID: MMSA-2025-00552
- CVSS 3.1
- 4.3
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N - EPSS
- 0.1% chance of exploitation in the next 30 days; higher than 3% of CVEs (scores of 2026-10-25)
- CWE
- CWE-863
- Published
- Modified
- Record from
- the NVD, synced
Affected
- mattermost:mattermost_server
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-gvg4-jhmr-6j23 | Go | github.com/mattermost/mattermost/server/v8 | >=11.5.0 <11.5.2 | 11.5.2 |
| GHSA-gvg4-jhmr-6j23 | Go | github.com/mattermost/mattermost/server/v8 | >=10.11.0 <10.11.14 | 10.11.14 |
| GHSA-gvg4-jhmr-6j23 | Go | github.com/mattermost/mattermost-plugin-playbooks | <1.41.1-0.20260213020129-e1d6ec2c94e6 | 1.41.1-0.20260213020129-e1d6ec2c94e6 |
| GO-2026-5404 | Go | github.com/mattermost/mattermost-plugin-playbooks | <1.41.1-0.20260213020129-e1d6ec2c94e6 | 1.41.1-0.20260213020129-e1d6ec2c94e6 |
| GO-2026-5404 | Go | github.com/mattermost/mattermost-server | >=10.11.0+incompatible <10.11.14+incompatible >=11.5.0+incompatible <11.5.2+incompatible | 10.11.14+incompatible, 11.5.2+incompatible |
| GO-2026-5404 | Go | github.com/mattermost/mattermost-server/v5 | all versions | no fix published |
| GO-2026-5404 | Go | github.com/mattermost/mattermost-server/v6 | all versions | no fix published |
| GO-2026-5404 | Go | github.com/mattermost/mattermost/server/v8 | all versions | no fix published |