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CVE-2026-27769

LOW CVSS: 2.7 Published: 2026-04-15 Modified: 2026-06-17

Description

Mattermost versions 10.11.x <= 10.11.12 fail to validate whether users were correctly owned by the correct Connected Workspace which allows a malicious remote server connected using the Conntexted Workspaces feature to change the displayed status of local users via the Connected Workspaces API.. Mattermost Advisory ID: MMSA-2026-00603

Affected Platforms

Mattermost Mattermost Server

Weakness Type

CWE-862

References