{"schemaVersion":3,"id":"CVE-2026-74039","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"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.","dates":{"published":"2026-08-18T17:26:12.871Z","modified":"2026-10-01T15:20:44.929Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.1,"severity":"high","version":"4.0","versionLabel":"v4.0","source":"CVE.org","vector":"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","computed":false,"selection":"backend-summary"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"CVE.org","score":7.1,"severity":"high","vector":"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","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","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","exploitability":null,"impact":null,"computed":false},{"version":"4.0","versionLabel":"v4.0","source":"NVD","score":7.1,"severity":"high","vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","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","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00555,"percentile":0.45525,"severity":"low","asOf":"2026-10-22T00:00:00.000Z","change":{"pp":0.22500000000000003,"baselineDate":"2026-09-22T00:00:00.000Z","baselineScore":0.0033},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00358,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00358,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00358,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.0033,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.0033,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.0033,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.0033,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.0033,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.0033,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.0033,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-22T00:00:00.000Z","score":0.00555,"percentile":0.45525}],"last30":[{"date":"2026-09-22T00:00:00.000Z","score":0.0033,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.0033,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00555,"percentile":null},{"date":"2026-10-22T00:00:00.000Z","score":0.00555,"percentile":0.45525}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[{"id":"GITHUB_WAZUH_WAZUH","name":"Wazuh","source":"github","url":"https://github.com/wazuh/wazuh/issues/9201","maturity":"poc","reliabilityScore":0.3,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":1,"weaknesses":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling","description":"The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.","type":"weakness","status":"Incomplete","abstraction":"Base","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/770.html"},{"id":"CWE-1333","name":"Inefficient Regular Expression Complexity","description":"The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/1333.html"}],"affected":[{"vendor":"wazuh","product":"wazuh","name":"wazuh","label":"wazuh","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 4.0.0, < 4.14.7","noFixRecorded":false,"fixedIn":null},{"text":"5.0.0:beta1","noFixRecorded":false,"fixedIn":null},{"text":"5.0.0:beta2","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 4.0.0, < 4.14.7 | 5.0.0:beta1 | 5.0.0:beta2","eol":null,"hubHref":"/vendor/wazuh/wazuh"},{"vendor":"wazuh","product":"wazuh-manager","name":"wazuh-manager","label":"wazuh-manager","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 4.0.0, < 4.14.7","noFixRecorded":false,"fixedIn":null},{"text":"5.0.0-beta2","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 4.0.0, < 4.14.7 | 5.0.0-beta2","eol":null,"hubHref":"/vendor/wazuh/wazuh-manager"}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/wazuh/wazuh/security/advisories/GHSA-5vh8-34r8-q74q","label":"github.com/wazuh/wazuh/security/advisories/GHSA-5vh8-34r8-q74q","hostname":"github.com","tags":["Vendor Advisory","Exploit","Mitigation"]},{"url":"https://github.com/wazuh/wazuh/pull/37034","label":"github.com/wazuh/wazuh/pull/37034","hostname":"github.com","tags":["Patch","Issue Tracking"]},{"url":"https://www.vulncheck.com/advisories/wazuh-api-dos-via-deeply-nested-json-auth-context","label":"www.vulncheck.com/advisories/wazuh-api-dos-via-deeply-nested-json-auth-context","hostname":"www.vulncheck.com","tags":["Third Party Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-08-18T17:26:12.871Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-10-01T15:20:44.929Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":39,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-22T14:56:20.047Z","stale":false,"partial":false}}