CVE-2026-26230
Low · 3.8CVSS
3.8
EPSS
0.3%
Published
Mar 16, 2026
CISA due date
—
The record
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
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|
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