{"id":"CVE-2026-74039","title":"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 POS…","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 arbitrarily deeply nested JSON structures to the POS…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-770","CWE-1333"],"vendor":"wazuh","product":"wazuh","affected":["wazuh >= 4.0.0, < 4.14.7","wazuh = 5.0.0"],"patched":["wazuh 4.14.7"],"published":"2026-08-18","updated":"2026-09-16","sourceUpdated":"2026-09-16T20:27:04.707","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74039","references":[{"url":"https://github.com/wazuh/wazuh/pull/37034","label":"disclosure@vulncheck.com"},{"url":"https://github.com/wazuh/wazuh/security/advisories/GHSA-5vh8-34r8-q74q","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/wazuh-api-dos-via-deeply-nested-json-auth-context","label":"disclosure@vulncheck.com"},{"url":"https://github.com/wazuh/wazuh/security/advisories/GHSA-5vh8-34r8-q74q","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"epss":0.00555,"epssPercentile":0.43931,"ingestedAt":"2026-09-08T21:11:12.282Z","exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-08-18T18:45:23.398620Z"},"slug":"CVE-2026-74039","body":"## Overview\n\nWazuh 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.\n\n## Affected\n\n- `wazuh >= 4.0.0, < 4.14.7`\n- `wazuh = 5.0.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `wazuh 4.14.7`","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":210254,"id":"CVE-2026-74039","ts":1790264821369,"field":"exploit_available","old":"false","new":"true"}]}