CVE-2026-2299 | THREATINT

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.

PUBLISHED Reserved 2026-02-10 | Published 2026-06-25 | Updated 2026-06-26 | Assigner Mattermost

MEDIUM: 4.2CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

Problem types

CWE-862: Missing Authorization

Product status

Default status

unaffected

Any version

affected

1.1.0

unaffected

Credits

Lorenzo Gallegos finder

References

github.com/...ermost-plugin-google-drive/releases/tag/v1.1.0

cve.org (CVE-2026-2299)

nvd.nist.gov (CVE-2026-2299)

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