CVE-2026-2299 — MEDIUM (4.2)

Vulnerability 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 Score

4.2

MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Related Weaknesses (CWE)

CWE-862

References

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

FAQ

What is CVE-2026-2299?

CVE-2026-2299 is a vulnerability with a CVSS score of 4.2 (MEDIUM). 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...

How severe is CVE-2026-2299?

CVE-2026-2299 has been rated MEDIUM with a CVSS base score of 4.2/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-2299?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.