CVE-2026-2299

MEDIUM4.2

Published 2026-06-25 · Updated 2026-06-25 · Source responsibledisclosure@mattermost.com

Description

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.

CVSS vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

CWE-862

References

https://github.com/mattermost/mattermost-plugin-google-drive/releases/tag/v1.1.0

View on NVD

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