{"cve":"CVE-2020-8561","nvd":{"published":"2021-09-20T17:15:08.187","modified":"2026-06-17T03:26:33.257","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N","score":4.1},"cwes":["CWE-610","CWE-441"],"references":["https://github.com/kubernetes/kubernetes/issues/104720","https://groups.google.com/g/kubernetes-security-announce/c/RV2IhwcrQsY","https://kubernetes.io/blog/2026/05/26/reconciling-unfixed-kubernetes-cves/","https://security.netapp.com/advisory/ntap-20211014-0002/","https://github.com/kubernetes/kubernetes/issues/104720"],"products":["kubernetes:kubernetes"],"source":"nvd","synced_at":"2026-10-19T21:23:41.316049955+00:00"},"epss":{"cve":"CVE-2020-8561","score":0.021,"percentile":0.81711,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-74j8-88mm-7496","url":"https://osv.dev/vulnerability/GHSA-74j8-88mm-7496","summary":"Confused Deputy in Kubernetes","modified":"2026-09-10T03:49:08.708639983Z","packages":[{"ecosystem":"Go","name":"k8s.io/kubernetes","purl":"pkg:golang/k8s.io/kubernetes","ranges":["<=1.22.2"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}