Vulnerability DatabaseCVE-2026-74040
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CVE-2026-74040
Published:October 13, 2026
Updated:October 15, 2026
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 Packages
https://github.com/wazuh/wazuh.git (GITHUB):
Affected version(s) >=v4.14.0 <v4.14.8
Fix Suggestion:
Update to version v4.14.8
Related Resources (6)
https://www.vulncheck.com/advisories/wazuh-3.9.0-before-4.14.8-arbitrary-file-overwrite-rce-via-process-files-from-worker
https://github.com/wazuh/wazuh/security/advisories/GHSA-88p6-7cm8-xwj8
https://github.com/wazuh/wazuh/releases/tag/v4.14.8
https://nvd.nist.gov/vuln/detail/CVE-2026-74040
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74040.json
https://github.com/wazuh/wazuh
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CVSS v4
Base Score:
9.4
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
HIGH
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
HIGH
Subsequent System Availability
HIGH
CVSS v3
Base Score:
9.1
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Missing Authorization
CWE-862