Description
Wazuh versions from 3.9.0 before 4.14.8 contain an arbitrary file overwrite vulnerability in MasterHandler.process_files_from_worker allowing a cluster worker to overwrite protected master files. Attackers controlling a worker can use a trailing-slash basename bypass and missing extra_valid enforcement to overwrite ossec.conf and agent.conf, achieving root remote code execution across the manager and every agent.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Wazuh | wazuh-manager | 3.9.0 – < 4.14.8 | 4.14.8 |
Advisories 1
- WID-SEC-2026-3878 Wazuh: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 13, 2026
References
- GitHub Security Advisory (GHSA-88p6-7cm8-xwj8) vendor-advisory
- Wazuh v4.14.8 Release Notes patch release-notes
- VulnCheck Advisory: Wazuh 3.9.0 before 4.14.8 Arbitrary File Overwrite RCE via process_files_from_worker third-party-advisory