CVE-2026-2299: Improper Access Control in Mattermost Google Drive Plugin File Creation Endpoint
Medium · CVSS 4.2 (CVSS 3.1)EPSS 0.20%, 10th percentilePublished Updated Assigner: Mattermost
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.
Vector CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N · CWE-862
Tracked companies
Mapped from the CVE’s affected-product data, NVD CPE matches, vendor advisories or package feeds. A mapping means the vendor’s software is named, not that its hosted service was exposed.
Status incidents that name it
No tracked status incident names this CVE.
Affected vendors and products
Mattermost: Mattermost Google Drive Plugin
References
- CVE record on cve.org (opens in new tab)
- NVD entry (opens in new tab)
- github.com/mattermost/mattermost-plugin-google-drive/releases/tag/v1.1.0 (opens in new tab)
- CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (opens in new tab)
- This product uses data from the NVD API but is not endorsed or certified by the NVD. (opens in new tab)
- Known Exploited Vulnerabilities catalog from CISA. (opens in new tab)
- EPSS scores from FIRST (Exploit Prediction Scoring System). (opens in new tab)