CVE-2026-2299

mediumCVSS 4.2covered by 1 sourcefirst seen 2026-06-25

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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Exploitation outlook

Low exploitation risk0.12% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all EPSS-scored CVEs.

Advisory coverage (1)

mediumCVE-2026-2299: The Mattermost Google Drive plugin before version 1.1.0 fails to validate channel membership in…nvd · 2026-06-25

External references

NVD record for CVE-2026-2299

CVE.org record

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