{"containers":{"cna":{"affected":[{"product":"Kubernetes","vendor":"Kubernetes","versions":[{"lessThan":"*","status":"affected","version":"0","versionType":"semver"}]}],"credits":[{"lang":"en","value":"QiQi Xu"}],"datePublic":"2021-09-15T00:00:00.000Z","descriptions":[{"lang":"en","value":"A security issue was discovered in Kubernetes where actors that control the responses of MutatingWebhookConfiguration or ValidatingWebhookConfiguration requests are able to redirect kube-apiserver requests to private networks of the apiserver. If that user can view kube-apiserver logs when the log level is set to 10, they can view the redirected responses and headers in the logs."}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.1,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"HIGH","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-441","description":"CWE-441 Unintended Proxy or Intermediary","lang":"en","type":"CWE"}]}],"providerMetadata":{"orgId":"a6081bf6-c852-4425-ad4f-a67919267565","shortName":"kubernetes","dateUpdated":"2026-06-01T21:45:29.198Z"},"references":[{"tags":["x_refsource_MISC"],"url":"https://kubernetes.io/blog/2026/05/26/reconciling-unfixed-kubernetes-cves/"},{"tags":["x_refsource_MISC"],"url":"https://groups.google.com/g/kubernetes-security-announce/c/RV2IhwcrQsY"},{"tags":["x_refsource_MISC"],"url":"https://github.com/kubernetes/kubernetes/issues/104720"},{"tags":["x_refsource_CONFIRM"],"url":"https://security.netapp.com/advisory/ntap-20211014-0002/"}],"source":{"defect":["https://github.com/kubernetes/kubernetes/issues/104720"],"discovery":"EXTERNAL"},"title":"Webhook redirect in kube-apiserver","x_generator":{"engine":"Vulnogram 0.0.9"}},"adp":[{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-04T10:03:46.267Z"},"title":"CVE Program Container","references":[{"tags":["x_refsource_MISC","x_transferred"],"url":"https://groups.google.com/g/kubernetes-security-announce/c/RV2IhwcrQsY"},{"tags":["x_refsource_MISC","x_transferred"],"url":"https://github.com/kubernetes/kubernetes/issues/104720"},{"tags":["x_refsource_CONFIRM","x_transferred"],"url":"https://security.netapp.com/advisory/ntap-20211014-0002/"}]}]},"cveMetadata":{"assignerOrgId":"a6081bf6-c852-4425-ad4f-a67919267565","assignerShortName":"kubernetes","cveId":"CVE-2020-8561","datePublished":"2021-09-20T17:05:16.328Z","dateReserved":"2020-02-03T00:00:00.000Z","dateUpdated":"2026-06-01T21:45:29.198Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"}