PT-2026-28421

CVE-2026-3112

Published

2026-03-26

Updated

2026-07-30

Description by

CVSS 3.1

6.8

Medium

MetricsAV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions Mattermost versions 10.11.x through 10.11.11 Mattermost versions 11.2.x through 11.2.3 Mattermost versions 11.3.x through 11.3.1 Mattermost versions 11.4.x through 11.4.0

Description The software does not properly validate file target paths for Advanced Logging. This allows system administrators to potentially read arbitrary host files through a malicious AdvancedLoggingJSON configuration when generating support packets.

Recommendations Mattermost versions 10.11.x through 10.11.11 should be updated. Mattermost versions 11.2.x through 11.2.3 should be updated. Mattermost versions 11.3.x through 11.3.1 should be updated. Mattermost versions 11.4.x through 11.4.0 should be updated.

Exploitability

Exploit

Fix

Impacts

Researchers

Mufeedvh

Vendors

Affected products

Weakness enumeration

CWE-22: Improper Limitation of a Pathname to a Restricted Directory (\'Path Traversal\')

Related identifiers

CVE-2026-3112