{"id":"CVE-2026-24470","state":"PUBLISHED","title":"Skipper Ingress Controller Allows Unauthorized Access to Internal Services via ExternalName","description":"Skipper is an HTTP router and reverse proxy for service composition. Prior to version 0.24.0, when running Skipper as an Ingress controller, users with permissions to create an Ingress and a Service of type ExternalName can create routes that enable them to use Skipper's network access to reach internal services. Version 0.24.0 disables Kubernetes ExternalName by default. As a workaround, developers can allow list targets of an ExternalName and allow list via regular expressions.","publishedAt":"2026-01-26T22:23:43.325Z","updatedAt":"2026-01-27T14:51:35.229Z","severity":{"score":8.1,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["zalando skipper"],"affected":[{"vendor":"zalando","product":"skipper","versions":[{"version":"< 0.24.0","status":"affected"}]}],"references":["https://github.com/zalando/skipper/security/advisories/GHSA-mxxc-p822-2hx9","https://github.com/zalando/skipper/commit/a4c87ce029a58eb8e1c2c1f93049194a39cf6219","https://kubernetes.io/docs/concepts/services-networking/service/#externalname"],"weaknesses":["CWE-441","CWE-918"],"ingestedAt":"2026-10-29T20:11:21.040Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/24xxx/CVE-2026-24470.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-24470","state":"PUBLISHED","datePublished":"2026-01-26T22:23:43.325Z","dateUpdated":"2026-01-27T14:51:35.229Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-01-23T00:38:20.546Z"},"containers":{"cna":{"title":"Skipper Ingress Controller Allows Unauthorized Access to Internal Services via ExternalName","descriptions":[{"lang":"en","value":"Skipper is an HTTP router and reverse proxy for service composition. Prior to version 0.24.0, when running Skipper as an Ingress controller, users with permissions to create an Ingress and a Service of type ExternalName can create routes that enable them to use Skipper's network access to reach internal services. Version 0.24.0 disables Kubernetes ExternalName by default. As a workaround, developers can allow list targets of an ExternalName and allow list via regular expressions."}],"affected":[{"vendor":"zalando","product":"skipper","versions":[{"version":"< 0.24.0","status":"affected"}]}],"references":[{"url":"https://github.com/zalando/skipper/security/advisories/GHSA-mxxc-p822-2hx9","name":"https://github.com/zalando/skipper/security/advisories/GHSA-mxxc-p822-2hx9","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/zalando/skipper/commit/a4c87ce029a58eb8e1c2c1f93049194a39cf6219","name":"https://github.com/zalando/skipper/commit/a4c87ce029a58eb8e1c2c1f93049194a39cf6219","tags":["x_refsource_MISC"]},{"url":"https://kubernetes.io/docs/concepts/services-networking/service/#externalname","name":"https://kubernetes.io/docs/concepts/services-networking/service/#externalname","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-441","lang":"en","description":"CWE-441: Unintended Proxy or Intermediary ('Confused Deputy')","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-918","lang":"en","description":"CWE-918: Server-Side Request Forgery (SSRF)","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-01-26T22:23:43.325Z"},"source":{"advisory":"GHSA-mxxc-p822-2hx9","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-01-27T14:50:06.337869Z","id":"CVE-2026-24470","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-01-27T14:51:35.229Z"}}]}}}