{"id":"GHSA-74j8-88mm-7496","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.","aliases":["CVE-2020-8561"],"modified":"2026-09-10T03:49:08.708639983Z","published":"2021-09-21T18:28:21Z","database_specific":{"github_reviewed":true,"github_reviewed_at":"2021-09-21T14:53:38Z","nvd_published_at":"2021-09-20T17:15:00Z","cwe_ids":["CWE-441","CWE-610"],"severity":"MODERATE"},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-8561"},{"type":"WEB","url":"https://github.com/kubernetes/kubernetes/issues/104720"},{"type":"PACKAGE","url":"https://github.com/kubernetes/kubernetes"},{"type":"WEB","url":"https://groups.google.com/g/kubernetes-security-announce/c/RV2IhwcrQsY"},{"type":"WEB","url":"https://kubernetes.io/blog/2026/05/26/reconciling-unfixed-kubernetes-cves"},{"type":"WEB","url":"https://security.netapp.com/advisory/ntap-20211014-0002"}],"affected":[{"package":{"name":"k8s.io/kubernetes","ecosystem":"Go","purl":"pkg:golang/k8s.io/kubernetes"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"last_affected":"1.22.2"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/09/GHSA-74j8-88mm-7496/GHSA-74j8-88mm-7496.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N"}]}