Vulnerabilities CVE-2026-16045

CVE-2026-16045

Low

Open

TLP:CLEAR

Delegated OAuth tokens could revoke unrelated OAuth application authorizations

NVD CVE.org

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Description

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

Details

CVSS Score: 2.7
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Confidence: 90%
Published: Aug 17, 2026
Last Modified: Aug 17, 2026

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