Vulnerability · Published Oct 13, 2026 · Assigned by VulnCheck

CVE-2026-74040Wazuh 3.9.0 before 4.14.8 Arbitrary File Overwrite RCE via process_files_from_worker

Critical 9.1

In plain English

A critical-severity missing authorization in wazuh-manager from Wazuh. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 54% of all known vulnerabilities).

Severity (CVSS 3.1)9.1Critical

Exploit odds (30 days)0.7%top 46.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
Wazuh	wazuh-manager	3.9.0 – before 4.14.8

Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

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