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Unrated severityNVD Advisory· Published Mar 16, 2026· Updated Mar 17, 2026

Team Admin Privilege Escalation to Demote Members to Guest

CVE-2026-26230

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

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

2
  • Mattermost/Mattermostllm-fuzzy2 versions
    <=10.11.10+ 1 more
    • (no CPE)range: <=10.11.10
    • (no CPE)range: 10.11.0

Patches

Vulnerability mechanics

References

1

News mentions

0

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