What is GHSA-m2c6-qhf9-2xm8?

GHSA-m2c6-qhf9-2xm8 is a security advisory published by GitHub Security Advisories with Medium severity. The Mattermost Google Drive plugin before version 1.1.0 fails to validate channel membership in...

Which CVE IDs does GHSA-m2c6-qhf9-2xm8 cover?

GHSA-m2c6-qhf9-2xm8 covers the following CVE IDs: CVE-2026-2299. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-m2c6-qhf9-2xm8?

GHSA-m2c6-qhf9-2xm8 has a CVSS v3 base score of 4.2, published by GitHub Security Advisories.

GHSA-m2c6-qhf9-2xm8MediumCVSS 4.2

The Mattermost Google Drive plugin before version 1.1.0 fails to validate channel membership in...

Vendor

GitHub Security Advisories

Published

June 25, 2026

Last Modified

June 25, 2026

🔗 CVE IDs covered (1)

CVE-2026-2299 →

📋 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.

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-2299
https://github.com/mattermost/mattermost-plugin-google-drive/releases/tag/v1.1.0
https://github.com/advisories/GHSA-m2c6-qhf9-2xm8