CVE-2026-2299
Medium
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.
SeverityMedium
CVSS4.2
Exploit probability—
Product
Mattermost Google Drive
PublishedJun 25, 2026
First seenJun 25, 2026
Weakness typeCWE-862Missing authorization
How to fix
Update
- mattermost google_drive1.1.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mattermost google_drive | v < 1.1.0, 1.1.0 | 1.1.0 |
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