CVE-2026-26230
LOW
2026-03-16
Mattermost
3.8
CVSS 3.1
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
Lifecycle Timeline
2
Analysis Generated
Mar 16, 2026 - 20:38 vuln.today
CVE Published
Mar 16, 2026 - 20:19 nvd
LOW 3.8
Description
Mattermost versions 10.11.x <= 10.11.10 fail to properly validate permission requirements in the team member roles API endpoint which allows team administrators to demote members to guest role. Mattermost Advisory ID: MMSA-2025-00531
Analysis
Mattermost versions 10.11.x <= 10.11.10 fail to properly validate permission requirements in the team member roles API endpoint which allows team administrators to demote members to guest role.
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Remediation
During next maintenance window: Apply vendor patches when convenient. Monitor vendor channels for updates.
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Priority Score
19
Low
Medium
High
Critical
KEV: 0
EPSS: +0.0
CVSS: +19
POC: 0
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External POC / Exploit Code
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