{"schema_version":"1.7.3","id":"GHSA-4g2f-xcph-2335","published":"2026-02-04T00:30:29Z","modified":"2026-06-19T18:29:26.718583040Z","aliases":["CVE-2026-24513","GO-2026-4419"],"related":["CGA-hcq8-cgv2-2246"],"summary":"ingress-nginx has Improper Check for Unusual or Exceptional Conditions","details":"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. Triggering this issue requires an administrator to specifically configure ingress-nginx with a broken external component.","affected":[{"package":{"name":"k8s.io/ingress-nginx","ecosystem":"Go","purl":"pkg:golang/k8s.io/ingress-nginx"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.13.7"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/02/GHSA-4g2f-xcph-2335/GHSA-4g2f-xcph-2335.json"}},{"package":{"name":"k8s.io/ingress-nginx","ecosystem":"Go","purl":"pkg:golang/k8s.io/ingress-nginx"},"ranges":[{"type":"SEMVER","events":[{"introduced":"1.14.0"},{"fixed":"1.14.3"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/02/GHSA-4g2f-xcph-2335/GHSA-4g2f-xcph-2335.json"}}],"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-24513"},{"type":"WEB","url":"https://github.com/kubernetes/kubernetes/issues/136679"},{"type":"PACKAGE","url":"https://github.com/kubernetes/ingress-nginx"}],"database_specific":{"cwe_ids":["CWE-754"],"github_reviewed":true,"github_reviewed_at":"2026-02-04T20:05:31Z","nvd_published_at":"2026-02-03T23:16:07Z","severity":"LOW"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N"}]}