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
Advisories

No advisories yet.

Fixes

Solution

Update Mattermost to versions 11.9.0, 11.8.1, 11.7.4, 11.6.6, 10.11.21 or higher.


Workaround

No workaround given by the vendor.

References
History

Tue, 28 Jul 2026 20:00:00 +0000

Type Values Removed Values Added
First Time appeared Mattermost
Mattermost mattermost
Vendors & Products Mattermost
Mattermost mattermost

Tue, 28 Jul 2026 16:15:00 +0000

Type Values Removed Values Added
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
Title SAML certificate deletion allows path traversal to delete arbitrary files outside the config directory
Weaknesses CWE-22
References
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Mattermost

Published:

Updated: 2026-07-28T14:48:13.408Z

Reserved: 2026-04-30T16:51:23.295Z

Link: CVE-2026-7521

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Analyzed

Published: 2026-07-28T15:17:51.510

Modified: 2026-07-29T15:06:39.703

Link: CVE-2026-7521

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-03T15:00:15Z

Weaknesses