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CVE-2026-7521

MEDIUM CVSS: 5.5 Published: 2026-07-28 Modified: 2026-07-29

Description

Mattermost versions 11.8.x <= 11.8.0, 11.7.x <= 11.7.3, 11.6.x <= 11.6.5, 10.11.x <= 10.11.20 fail to verify file deletion path which allows an admin with SAML system-console write permissions to delete arbitrary files outside the config directory from the server via the remove file endpoint.. Mattermost Advisory ID: MMSA-2026-00666

Affected Platforms

Mattermost Mattermost Server

Weakness Type

CWE-22

References