{"id":"CVE-2026-74039","summary":"Wazuh 4.0.0 \u003c 4.14.7 API DoS via Deeply Nested JSON auth_context","details":"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.","aliases":["GHSA-5vh8-34r8-q74q"],"modified":"2026-08-20T03:48:22.452934227Z","published":"2026-08-18T17:26:12.871Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-1333","CWE-770"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74039.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74039.json"},{"type":"ADVISORY","url":"https://github.com/wazuh/wazuh/security/advisories/GHSA-5vh8-34r8-q74q"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74039"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/wazuh-api-dos-via-deeply-nested-json-auth-context"},{"type":"FIX","url":"https://github.com/wazuh/wazuh/pull/37034"},{"type":"PACKAGE","url":"https://github.com/wazuh/wazuh"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/wazuh/wazuh","events":[{"introduced":"8c2c62a6e9dcbcf2c792f7924e8cfdb26842820b"},{"fixed":"a42268a27c555d9348d5598fb8751eaf4c8e9024"},{"introduced":"b58b3b2552497639b1b2a2b23e8de87e4ce9cf02"},{"last_affected":"b58b3b2552497639b1b2a2b23e8de87e4ce9cf02"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"4.0.0"},{"fixed":"4.14.7"},{"introduced":"5.0.0-beta2"},{"last_affected":"5.0.0-beta2"}]}}],"versions":["5.0.0-beta2","v5.0.0-beta2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74039.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}]}