{"id":"CVE-2026-74039","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-74039","summary":"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…","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.","published":"2026-08-18T18:19:33.760","modified":"2026-08-18T18:19:33.760","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":{"url":"https://github.com/wazuh/wazuh/pull/37034","label":"wazuh/wazuh#37034"},"references":[{"type":"WEB","url":"https://github.com/wazuh/wazuh/pull/37034"},{"type":"WEB","url":"https://github.com/wazuh/wazuh/security/advisories/GHSA-5vh8-34r8-q74q"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/wazuh-api-dos-via-deeply-nested-json-auth-context"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-08-18T18:19:33.760"}}