CVE-2026-74040

Critical

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.

SeverityCritical

CVSS9.1

Exploit probability—

ProductWazuh-manager

PublishedOct 13, 2026

First seenOct 13, 2026

Weakness typeCWE-862Missing authorization

How to fix

Update

Wazuh wazuh-manager4.14.8 or later

Patches

github.com/wazuh/wazuh/releases/tag/v4.14.8

Vendor advisories

github.com/wazuh/wazuh/security/advisories/GHSA-88p6-7cm8-xwj8

Affected products

Product	Affected versions	Fixed in
Wazuh wazuh-manager	3.9.0 ≤ v < 4.14.8	4.14.8

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