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.

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Advisories

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Fixes

Solution

Update Mattermost Google Drive plugin to version 1.1.0 or higher.


Workaround

No workaround given by the vendor.

History

Fri, 26 Jun 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 26 Jun 2026 10:45:00 +0000

Type Values Removed Values Added
First Time appeared Mattermost
Mattermost mattermost Google Drive Plugin
Vendors & Products Mattermost
Mattermost mattermost Google Drive Plugin

Thu, 25 Jun 2026 20:00:00 +0000

Type Values Removed Values Added
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.
Title Improper Access Control in Mattermost Google Drive Plugin File Creation Endpoint
Weaknesses CWE-862
References
Metrics cvssV3_1

{'score': 4.2, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Mattermost

Published:

Updated: 2026-06-26T14:05:09.476Z

Reserved: 2026-02-10T16:46:56.322Z

Link: CVE-2026-2299

cve-icon Vulnrichment

Updated: 2026-06-26T14:05:02.576Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-26T09:36:28Z

Weaknesses