CVE-2026-26230

CVSS Score & Metrics

Base Score

3.8 / 10

Vector String

                                        CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N                                    

Vulnerability 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

Vulnerability Details

Published Date

March 16, 2026

Last Modified

March 18, 2026

CWE ID

CWE-863

Source

NVD

Vendor

Mattermost

Product

Mattermost

External References

https://mattermost.com/security-updates

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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