No advisories yet.
Solution
Update Mattermost to versions 11.10.0, 11.9.1, 11.8.5, 11.7.8 or higher.
Workaround
No workaround given by the vendor.
| Link | Providers |
|---|---|
| https://mattermost.com/security-updates |
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Mon, 14 Sep 2026 21:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Mattermost
Mattermost mattermost |
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| Vendors & Products |
Mattermost
Mattermost mattermost |
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| Metrics |
ssvc
|
Mon, 14 Sep 2026 14:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Mattermost versions 11.9.x <= 11.9.0, 11.8.x <= 11.8.4, 11.7.x <= 11.7.7 fail to enforce authorization boundaries on the access control policy update endpoint which allows a channel or team administrator to detach a system-assigned ABAC parent policy via a crafted PUT /api/v4/access_control_policies request with an empty imports list.. Mattermost Advisory ID: MMSA-2026-00724 | |
| Title | Mattermost ABAC parent policy bypass via policy update endpoint | |
| Weaknesses | CWE-863 | |
| References |
| |
| Metrics |
cvssV3_1
|
Projects
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Status: PUBLISHED
Assigner: Mattermost
Published:
Updated: 2026-09-14T19:23:01.097Z
Reserved: 2026-08-31T11:19:09.113Z
Link: CVE-2026-82920
Updated: 2026-09-14T19:15:26.488Z
Status : Received
Published: 2026-09-14T14:17:13.010
Modified: 2026-09-14T20:16:57.467
Link: CVE-2026-82920
No data.
OpenCVE Enrichment
Updated: 2026-09-14T20:00:08Z