CVE-2026-16048
MEDIUM
NVD
CVSS Score
6.3
Severity
MEDIUM
Published
Aug 17, 2026
Vendor
unknown
Description
Mattermost versions 11.8.x <= 11.8.2, 11.7.x <= 11.7.6, 10.11.x <= 10.11.21 fail to restrict channel member role assignment to channel-scoped roles which allows a channel administrator to gain additional channel permissions via the channel member roles API.. Mattermost Advisory ID: MMSA-2026-00697