CVE-2026-2299 Improper Access Control in Mattermost Google Drive Plugin File Creation Endpoint

The Mattermost Google Drive plugin before version 1.1.0 fails to validate channel membership in the file creation endpoint, allowing authenticated users with a connected Google account to share Google Drive files to unauthorized private channels and disclose private channel membership...

CVE-2026-2299

CVE-2026-2299 affects the Mattermost Google Drive plugin prior to version 1.1.0. The file creation endpoint does not validate channel membership, allowing authenticated users with a connected Google account to share Google Drive files into unauthorized private channels and disclose private channe...