CVE-2026-9812
6.5
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
Mattermost versions 11.9.x <= 11.9.0, 11.8.x <= 11.8.4, 11.7.x <= 11.7.7, 10.11.x <= 10.11.22 fail to validate that a property field belongs to the specified run before updating its value which allows an authenticated user with run property-management access to crash the Playbooks plugin via a REST request referencing a property field that belongs to a different run. Mattermost Advisory ID: MMSA-2026-00684
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Mattermost | Mattermost | 11.9.0 <= 11.9.0 | affected |
| Mattermost | Mattermost | 11.8.0 <= 11.8.4 | affected |
| Mattermost | Mattermost | 11.7.0 <= 11.7.7 | affected |
| Mattermost | Mattermost | 10.11.0 <= 10.11.22 | affected |
| Mattermost | Mattermost | 11.10.0 | unaffected |
| Mattermost | Mattermost | 11.9.1 | unaffected |
| Mattermost | Mattermost | 11.8.5 | unaffected |
| Mattermost | Mattermost | 11.7.8 | unaffected |
| Mattermost | Mattermost | 10.11.23 | unaffected |
Weaknesses
- CWE-639: CWE-639: Authorization Bypass Through User-Controlled Key
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: partial
References
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