What is CVE-2026-74039?

CVE-2026-74039 is a medium-severity vulnerability in Wazuh Wazuh-Manager, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-08-18.

How severe is CVE-2026-74039?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Resource exhaustion in Wazuh Wazuh-Manager

CVE-2026-74039

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 v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Wazuh Wazuh-manager — versions 5.0.0-beta2

Weakness classification (CWE)

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-74039?: CVE-2026-74039 is a medium-severity vulnerability in Wazuh Wazuh-Manager, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2026-08-18.
How severe is CVE-2026-74039?: Medium severity. CVSS v3 base score is 6.5 out of 10.