{"id":"CVE-2026-24513","state":"PUBLISHED","title":"ingress-nginx auth-url protection bypass","description":"A security issue was discovered in ingress-nginx where the protection afforded by the `auth-url` Ingress annotation may not be effective in the presence of a specific misconfiguration.\n\nIf the ingress-nginx controller is configured with a default custom-errors configuration that includes HTTP errors 401 or 403, and if the configured default custom-errors backend is defective and fails to respect the X-Code HTTP header, then an Ingress with the `auth-url` annotation may be accessed even when authentication fails.\n\nNote that the built-in custom-errors backend works correctly. To trigger this issue requires an administrator to specifically configure ingress-nginx with a broken external component.","publishedAt":"2026-02-03T22:17:17.315Z","updatedAt":"2026-02-18T17:29:42.496Z","severity":{"score":3.1,"label":"Low","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","source":"kubernetes"},"assigner":"kubernetes","products":["Kubernetes ingress-nginx"],"affected":[{"vendor":"Kubernetes","product":"ingress-nginx","defaultStatus":"affected","versions":[{"version":"0","status":"affected","lessThan":"1.13.7","versionType":"semver"},{"version":"0","status":"affected","lessThan":"1.14.3","versionType":"semver"}],"repo":"https://github.com/kubernetes/ingress-nginx"}],"references":["https://github.com/kubernetes/kubernetes/issues/136679"],"weaknesses":["CWE-754"],"ingestedAt":"2026-10-29T20:11:21.040Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/24xxx/CVE-2026-24513.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-24513","state":"PUBLISHED","datePublished":"2026-02-03T22:17:17.315Z","dateUpdated":"2026-02-18T17:29:42.496Z","assignerShortName":"kubernetes","assignerOrgId":"a6081bf6-c852-4425-ad4f-a67919267565","dateReserved":"2026-01-23T06:54:35.913Z"},"containers":{"cna":{"title":"ingress-nginx auth-url protection bypass","descriptions":[{"lang":"en","value":"A security issue was discovered in ingress-nginx where the protection afforded by the `auth-url` Ingress annotation may not be effective in the presence of a specific misconfiguration.\n\nIf the ingress-nginx controller is configured with a default custom-errors configuration that includes HTTP errors 401 or 403, and if the configured default custom-errors backend is defective and fails to respect the X-Code HTTP header, then an Ingress with the `auth-url` annotation may be accessed even when authentication fails.\n\nNote that the built-in custom-errors backend works correctly. To trigger this issue requires an administrator to specifically configure ingress-nginx with a broken external component."}],"affected":[{"vendor":"Kubernetes","product":"ingress-nginx","defaultStatus":"affected","versions":[{"version":"0","status":"affected","lessThan":"1.13.7","versionType":"semver"},{"version":"0","status":"affected","lessThan":"1.14.3","versionType":"semver"}],"repo":"https://github.com/kubernetes/ingress-nginx"}],"references":[{"url":"https://github.com/kubernetes/kubernetes/issues/136679"}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":3.1,"baseSeverity":"LOW","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-754","description":"CWE-754 Improper Check for Unusual or Exceptional Conditions","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"kubernetes","orgId":"a6081bf6-c852-4425-ad4f-a67919267565","dateUpdated":"2026-02-18T17:29:42.496Z"},"datePublic":"2026-02-02T14:00:00.000Z","impacts":[{"capecId":"CAPEC-115","descriptions":[{"lang":"en","value":"CAPEC-115 Authentication Bypass"}]}],"credits":[{"lang":"en","value":"Aurelia Schittler","type":"finder"}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 0.5.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-02-04T18:20:39.187137Z","id":"CVE-2026-24513","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-02-04T18:21:14.824Z"}}]}}}