{
"id": "GHSA-74j8-88mm-7496",
"aliases": [
"CVE-2020-8561"
],
"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.",
"summary": "Confused Deputy in Kubernetes",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"last_affected": "1.22.2"
}
]
}
],
"package": {
"name": "k8s.io/kubernetes",
"ecosystem": "Go"
}
}
],
"modified": "2026-06-09T10:51:43Z",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N"
}
],
"published": "2021-09-21T18:28:21Z",
"references": [
{
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-8561",
"type": "ADVISORY"
},
{
"url": "https://github.com/kubernetes/kubernetes/issues/104720",
"type": "WEB"
},
{
"url": "https://github.com/kubernetes/kubernetes",
"type": "PACKAGE"
},
{
"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",
"type": "WEB"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-441",
"CWE-610"
],
"severity": "MODERATE",
"github_reviewed": true,
"nvd_published_at": "2021-09-20T17:15:00Z",
"github_reviewed_at": "2021-09-21T14:53:38Z"
}
}