CVE-2026-3112

CWE-22 — Path Traversal5 documents5 sources
Severity
4.9MEDIUM
EPSS
0.1%
top 82.74%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Github.com Mattermost/mattermost/server/v8Mattermost Mattermost ServerMattermost Mattermost
Timeline
PublishedMar 26

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

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:NExploitability: 2.3 | Impact: 4.0

Affected Packages3 packages

▶NVDmattermost/mattermost_server10.11.0 — 10.11.12+3
▶Gogithub.com/mattermost/mattermost/server/v811.4.0-rc1 — 11.4.1+4
▶CVEListV5mattermost/mattermost11.4.0 — 11.4.0+3

🔴Vulnerability Details

3
GHSA
Mattermost allows system administrators to read arbitrary host files via malicious AdvancedLoggingJSON configuration↗2026-03-26
▶
CVEList
Arbitrary File Read via Advanced Logging Support Packet↗2026-03-26
▶
OSV
Mattermost allows system administrators to read arbitrary host files via malicious AdvancedLoggingJSON configuration↗2026-03-26
▶

🕵️Threat Intelligence

1
Wiz
CVE-2026-3112 Impact, Exploitability, and Mitigation Steps | Wiz↗
▶
CVE-2026-3112 (MEDIUM CVSS 4.9) | Mattermost versions 11.4.x <= 11.4. | cvebase.io