CVE-2026-16045 — Delegated OAuth tokens could revoke unrelated OAuth application authorizations
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 sessi…
Published: 2026-08-17 · CVSS: 2.7 · CVSS 3.1
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
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7