CVE-2026-16048

MEDIUM CVSS 6.3 View on NVD ↗

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

CVSS Vector

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

References

https://mattermost.com/security-updates

Published: Aug 17, 2026 15:16 UTC Modified: Aug 17, 2026 16:16 UTC