CVE-2026-7521

SAML certificate deletion allows path traversal to delete arbitrary files outside the config directory

Published Jul 28, 2026 CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
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

Remediation

Vendor Solution

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

Tracking

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Advisories

No advisories available
References
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

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

Weaknesses

Sources

Status
PUBLISHED
Assigner
Mattermost
Published
Updated
Jul 28, 2026, 2:48 PM
Reserved
Apr 30, 2026, 4:51 PM
Status
Analyzed
Published
Jul 28, 2026, 3:17 PM
Modified
Jul 29, 2026, 3:06 PM