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.

• CWE-770
• CWE-1333

• https://github.com/wazuh/wazuh/pull/37034Issue Tracking, Patch
• https://github.com/wazuh/wazuh/security/advisories/GHSA-5vh8-34r8-q74qExploit, Mitigation, Vendor Advisory
• https://www.vulncheck.com/advisories/wazuh-api-dos-via-deeply-nested-json-auth-contextThird Party Advisory
• https://github.com/wazuh/wazuh/security/advisories/GHSA-5vh8-34r8-q74qExploit, Mitigation, Vendor Advisory

Published

Aug 18, 2026

Last Modified

Sep 16, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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