CVE-2026-16045
Medium · 4.3CVSS
4.3
EPSS
0.3%
Published
Aug 17, 2026
CISA due date
—
The record
Mattermost versions 11.7.x <= 11.7.6, 10.11.x <= 10.11.21 Mattermost failed to restrict OAuth deauthorization and personal access token management endpoints to direct user sessions, which allowed an OAuth app with a delegated user token to revoke the user's authorizations or tokens for other integrations via account-management endpoints.. Mattermost Advisory ID: MMSA-2026-00704
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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