CVE-2026-2299 (GCVE-0-2026-2299)
Vulnerability from cvelistv5 – Published: 2026-06-25 18:55 – Updated: 2026-06-26 14:05
VLAI
EPSS
VEX
Title
Improper Access Control in Mattermost Google Drive Plugin File Creation Endpoint
Summary
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.
Severity
4.2 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-26 14:04 UTC
CWE
- CWE-862 - Missing Authorization
Assigner
Mattermost
CNA
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Mattermost | Mattermost Google Drive Plugin |
Affected:
0 , ≤ 1.0.0
(semver)
Unaffected: 1.1.0 |
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