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
Metrics
Affected Vendors & Products
References
| Link | Providers |
|---|---|
| https://mattermost.com/security-updates |
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History
Tue, 06 Oct 2026 18:15:00 +0000
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Mattermost mattermost Server
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| CPEs | cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Mattermost mattermost Server
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Mon, 14 Sep 2026 21:00:00 +0000
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Mattermost
Mattermost mattermost |
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Mattermost
Mattermost mattermost |
Mon, 14 Sep 2026 12:30:00 +0000
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ssvc
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Mon, 14 Sep 2026 10:45:00 +0000
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| Description | 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 | |
| Title | Missing property field ownership validation in Playbooks run property update endpoint | |
| Weaknesses | CWE-639 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: Mattermost
Published: 2026-09-14T10:43:45.589Z
Updated: 2026-09-14T11:19:44.536Z
Reserved: 2026-05-28T08:47:31.086Z
Link: CVE-2026-9812
Updated: 2026-09-14T11:13:26.815Z
Status : Analyzed
Published: 2026-09-14T11:17:08.393
Modified: 2026-10-06T17:55:57.020
Link: CVE-2026-9812
No data.