All intelligence
// vulnerability record
cached · NVD via COSMOS syncCVE-2026-16047
MEDIUMpublished 2026-08-17 15:16 UTC · 18 hours ago · modified 2026-08-17 16:16 UTC
4.3
CVSS / 10
// description
Mattermost versions 11.7.x <= 11.7.6, 10.11.x <= 10.11.21, 11.8.x <= 11.8.3 fail to validate that users have read access to a channel before linking a board to it, which allows an authenticated attacker to discover the membership of private channels on the same team via creating, patching, importing, or bulk-creating boards with an arbitrary channelId. Mattermost Advisory ID: MMSA-2026-00674
// weaknesses (CWE)
- CWE-862