{"id":"CVE-2020-8561","aliases":["GHSA-74j8-88mm-7496"],"url":"https://o3.security/vulnerability/CVE-2020-8561","summary":"Confused Deputy in Kubernetes","details":"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.","published":"2021-09-20T17:15:08.187Z","modified":"2026-08-07T15:14:52.870479Z","cvss":{"score":4.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N"},"epss":{"score":0.021,"percentile":0.80029,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"k8s.io/kubernetes","fixedVersion":null}],"fix":null,"references":[{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20211014-0002/"},{"type":"REPORT","url":"https://github.com/kubernetes/kubernetes/issues/104720"},{"type":"ARTICLE","url":"https://groups.google.com/g/kubernetes-security-announce/c/RV2IhwcrQsY"},{"type":"ARTICLE","url":"https://kubernetes.io/blog/2026/05/26/reconciling-unfixed-kubernetes-cves/"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T15:14:52.870479Z"}}