CVE-2026-7521

published 2026-07-28

CVE-2026-7521: 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…

Priority P3 35 medium 5.5 CVSS 3.1

AV N AC L PR H UI N S U C N I L A H

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

8 ranges

Vendor	Product	Version range	Fixed in
mattermost	mattermost	10.11.0 – 10.11.20	—
mattermost	mattermost	11.6.0 – 11.6.5	—
mattermost	mattermost	11.7.0 – 11.7.3	—
mattermost	mattermost	11.8.0 – 11.8.0	—
mattermost	mattermost_server	>= 10.11.0 < 10.11.21	10.11.21
mattermost	mattermost_server	>= 11.6.0 < 11.6.6	11.6.6
mattermost	mattermost_server	>= 11.7.0 < 11.7.4	11.7.4
mattermost	mattermost_server	>= 11.8.0 < 11.8.1	11.8.1

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CWE-22