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.

CVSS 3.1

4.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS

0.2% chance of exploitation in the next 30 days; higher than 9% of CVEs (scores of 2026-10-25)

CWE

CWE-862

Published

2026-06-25

Modified

2026-10-25

Record from

the NVD, synced 2026-10-25

Affected

• mattermost:google_drive

References

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

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