CVE-2026-3112 MEDIUM

CVE-2026-3112: Arbitrary File Read via Advanced Logging Support Packet

Vendor Mattermost
Product Mattermost
Weakness CWE-22 · Path traversal
Published March 26, 2026
Last update March 26, 2026
View on NVD All CVEs

CVSS base score

6.8/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality High
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N

What the vulnerability does

01Description

Mattermost versions 11.4.x <= 11.4.0, 11.3.x <= 11.3.1, 11.2.x <= 11.2.3, 10.11.x <= 10.11.11 fail to validate Advanced Logging file target paths which allows system administrators to read arbitrary host files via malicious AdvancedLoggingJSON configuration in support packet generation. Mattermost Advisory ID: MMSA-2025-00562

Key dates

02Disclosure timeline

March 26, 2026 CVE published
March 26, 2026 Record updated