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 fail to require system-level permission when patching protected default system roles, which allows authenticated users with delegated user-management permissions to escalate privileges by altering built-in role permissions via the role patch API.. Mattermost Advisory ID: MMSA-2026-00656
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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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
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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 fail to require system-level permission when patching protected default system roles, which allows authenticated users with delegated user-management permissions to escalate privileges by altering built-in role permissions via the role patch API.. Mattermost Advisory ID: MMSA-2026-00656 | |
| Title | Mattermost: Delegated admins could patch protected default system roles | |
| Weaknesses | CWE-863 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: Mattermost
Published:
Updated: 2026-06-12T17:19:31.028Z
Reserved: 2026-04-21T08:47:06.795Z
Link: CVE-2026-6739
Updated: 2026-06-12T17:19:28.401Z
Status : Received
Published: 2026-06-12T17:16:27.290
Modified: 2026-06-12T17:16:27.290
Link: CVE-2026-6739
No data.
OpenCVE Enrichment
Updated: 2026-06-12T18:30:32Z