Moderate severityNVD Advisory· Published Mar 26, 2026· Updated Mar 26, 2026
Arbitrary File Read via Advanced Logging Support Packet
CVE-2026-3112
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
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/mattermost/mattermost/server/v8Go | >= 11.4.0-rc1, < 11.4.1 | 11.4.1 |
github.com/mattermost/mattermost/server/v8Go | >= 11.3.0-rc1, < 11.3.2 | 11.3.2 |
github.com/mattermost/mattermost/server/v8Go | >= 11.2.0-rc1, < 11.2.4 | 11.2.4 |
github.com/mattermost/mattermost/server/v8Go | >= 10.11.0-rc1, < 10.11.12 | 10.11.12 |
github.com/mattermost/mattermost/server/v8Go | >= 8.0.0-20260105080200-d27a2195068d, < 8.0.0-20260217110922-b7d4a1f1f59b | 8.0.0-20260217110922-b7d4a1f1f59b |
Affected products
1- Range: 11.4.0
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
3- github.com/advisories/GHSA-3mw5-466q-295qghsaADVISORY
- mattermost.com/security-updatesghsavendor-advisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-3112ghsaADVISORY
News mentions
2- ⚡ Weekly Recap: Linux Rootkit, macOS Crypto Stealer, WebSocket Skimmers and MoreThe Hacker News · May 11, 2026
- When DNSSEC goes wrong: how we responded to the .de TLD outageCloudflare Blog · May 6, 2026