Metrics
Affected Vendors & Products
No advisories yet.
Solution
Update Mattermost to versions 11.9.0, 11.7.7, 11.8.4 or higher.
Workaround
No workaround given by the vendor.
| Link | Providers |
|---|---|
| https://mattermost.com/security-updates |
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Mon, 17 Aug 2026 16:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Mon, 17 Aug 2026 15:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Mattermost
Mattermost mattermost |
|
| Vendors & Products |
Mattermost
Mattermost mattermost |
Mon, 17 Aug 2026 14:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Mattermost versions 11.7.x <= 11.7.6, 11.8.x <= 11.8.3 The access control policy unassign endpoint fails to re-validate that each target channel still belongs to the requesting admin's team, which allows an authenticated team administrator to remove ABAC (attribute-based access control) policy assignments from channels outside their team via the policy unassign API after a channel has been moved to another team.. Mattermost Advisory ID: MMSA-2026-00718 | |
| Title | Missing per-channel team-scope check in ABAC access control policy unassign allows cross-team policy removal | |
| Weaknesses | CWE-863 | |
| References |
| |
| Metrics |
cvssV3_1
|
Projects
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Status: PUBLISHED
Assigner: Mattermost
Published:
Updated: 2026-08-17T15:25:38.145Z
Reserved: 2026-07-14T16:02:49.735Z
Link: CVE-2026-15754
Updated: 2026-08-17T15:25:33.961Z
Status : Received
Published: 2026-08-17T15:16:53.743
Modified: 2026-08-17T16:16:49.923
Link: CVE-2026-15754
No data.
OpenCVE Enrichment
Updated: 2026-08-17T15:45:03Z