CVE-2026-3112

MEDIUM

Arbitrary File Read via Advanced Logging Support Packet

Title source: cna
STIX 2.1

Description

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

References (1)

Core 1
Core References
Vendor Advisory vendor-advisory
MMSA-2025-00562
https://mattermost.com/security-updates

Scores

CVSS v3 6.8
EPSS 0.0002
EPSS Percentile 5.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-22
Status published
Products (12)
Mattermost/Mattermost 10.11.0 - 10.11.11
Mattermost/Mattermost 10.11.12
Mattermost/Mattermost 11.2.0 - 11.2.3
Mattermost/Mattermost 11.2.4
Mattermost/Mattermost 11.3.0 - 11.3.1
Mattermost/Mattermost 11.3.2
Mattermost/Mattermost 11.4.0
mattermost/mattermost 11.4.0-rc1 - 11.4.1Go
Mattermost/Mattermost 11.4.1
Mattermost/Mattermost 11.5.0
... and 2 more
Published Mar 26, 2026
Tracked Since Mar 26, 2026