CVE-2026-2299
Improper Access Control in Mattermost Google Drive Plugin File Creation Endpoint
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.
INFO
Published Date :
June 25, 2026, 6:55 p.m.
Last Modified :
June 25, 2026, 6:55 p.m.
Remotely Exploit :
Yes !
Source :
Mattermost
Affected Products
The following products are affected by CVE-2026-2299
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 9302f53e-dde5-4bf3-b2f2-a83f91ac0eee |
Solution
- Update the Mattermost Google Drive plugin to version 1.1.0+.
- Verify channel membership validation is enforced.
- Review access controls for file sharing.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2026-2299 vulnerability anywhere in the article.