CVE-2026-7521
Medium
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
SeverityMedium
CVSS5.5
Exploit probability—
Product
Mattermost Server
PublishedJul 28, 2026
First seenJul 28, 2026
Weakness typeCWE-22Path traversal
How to fix
Update
- mattermost mattermost_server10.11.21, 11.6.6, 11.7.4, 11.8.1 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mattermost mattermost_server | 10.11.0 ≤ v < 10.11.21, 11.6.0 ≤ v < 11.6.6, 11.7.0 ≤ v < 11.7.4, 11.8.0 ≤ v < 11.8.1 | 10.11.21, 11.6.6, 11.7.4, 11.8.1 |
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