Vulnerability Details CVE-2026-2299
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 2.1%
CVSS Severity
CVSS v3 Score 4.2
Products affected by CVE-2026-2299
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cpe:2.3:a:mattermost:google_drive:*
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cpe:2.3:a:mattermost:google_drive:1.1.0