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EUVD-2026-60541 · Published Aug 17, 2026
Mattermost versions 11.7.x <= 11.7.6, 10.11.x <= 10.11.21, 11.8.x <= 11.8.3 fail to enforce PermissionManageBoardRoles on the channelId field of the batch endpoint, which allows an authenticated board editor to relink any board they can edit to an arbitrary channel via a crafted PATCH request. Mattermost Advisory ID: MMSA-2026-00686
Technologies
Mattermost Mattermost Server
Weaknesses
CWE-863
CVSS scores
- v3.16.5
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
MITRE ATT&CK
InferredWhere this vulnerability fits in an attack
Initial Access
References
Potentially impacted assets
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