Vulnerability Description
Wazuh 4.0.0 before 4.14.7 and 5.0.0-beta2 contain a denial of service vulnerability that allows authenticated attackers with allow_run_as enabled to exhaust CPU resources by submitting arbitrarily deeply nested JSON structures to the POST /security/user/authenticate/run_as endpoint. Attackers can repeatedly submit malformed auth_context bodies with unlimited nesting depth to cause the API framework to consume excessive CPU, denying service to all other API consumers.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Wazuh | Wazuh | >= 4.0.0, < 4.14.7 |
Related Weaknesses (CWE)
References
- https://github.com/wazuh/wazuh/pull/37034Issue TrackingPatch
- https://github.com/wazuh/wazuh/security/advisories/GHSA-5vh8-34r8-q74qExploitMitigationVendor Advisory
- https://www.vulncheck.com/advisories/wazuh-api-dos-via-deeply-nested-json-auth-cThird Party Advisory
- https://github.com/wazuh/wazuh/security/advisories/GHSA-5vh8-34r8-q74qExploitMitigationVendor Advisory
FAQ
What is CVE-2026-74039?
CVE-2026-74039 is a vulnerability with a CVSS score of 6.5 (MEDIUM). Wazuh 4.0.0 before 4.14.7 and 5.0.0-beta2 contain a denial of service vulnerability that allows authenticated attackers with allow_run_as enabled to exhaust CPU resources by submitting arbitrarily dee...
How severe is CVE-2026-74039?
CVE-2026-74039 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-74039?
Check the references section above for vendor advisories and patch information. Affected products include: Wazuh Wazuh.