Mattermost versions 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 10.11.15, 10.11.x <= 10.11.16 Mattermost fails to require role-management authorization when setting the scheme_admin flag on group syncable link and patch endpoints, which allows a user with group-link permissions to escalate themselves and group members to team or channel admin via crafted API requests.. Mattermost Advisory ID: MMSA-2026-00665
Metrics
Affected Vendors & Products
References
| Link | Providers |
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| https://mattermost.com/security-updates |
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History
Fri, 12 Jun 2026 18:45:00 +0000
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| First Time appeared |
Mattermost
Mattermost mattermost |
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| Vendors & Products |
Mattermost
Mattermost mattermost |
Fri, 12 Jun 2026 18:30:00 +0000
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ssvc
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Fri, 12 Jun 2026 17:15:00 +0000
| Type | Values Removed | Values Added |
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| Description | Mattermost versions 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 10.11.15, 10.11.x <= 10.11.16 Mattermost fails to require role-management authorization when setting the scheme_admin flag on group syncable link and patch endpoints, which allows a user with group-link permissions to escalate themselves and group members to team or channel admin via crafted API requests.. Mattermost Advisory ID: MMSA-2026-00665 | |
| Title | Mattermost group syncable endpoints allow privilege escalation via scheme_admin | |
| Weaknesses | CWE-863 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: Mattermost
Published:
Updated: 2026-06-12T17:18:09.364Z
Reserved: 2026-04-29T09:18:29.691Z
Link: CVE-2026-7387
Updated: 2026-06-12T17:18:05.747Z
Status : Received
Published: 2026-06-12T17:16:27.653
Modified: 2026-06-12T17:16:27.653
Link: CVE-2026-7387
No data.
OpenCVE Enrichment
Updated: 2026-06-12T18:30:32Z