MEDIUM 4.1 Go
Confused Deputy in Kubernetes
GHSA-74j8-88mm-7496 · CVE-2020-8561
Published · 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.
References
- ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2020-8561
- WEB https://github.com/kubernetes/kubernetes/issues/104720
- PACKAGE https://github.com/kubernetes/kubernetes
- WEB https://groups.google.com/g/kubernetes-security-announce/c/RV2IhwcrQsY
- WEB https://kubernetes.io/blog/2026/05/26/reconciling-unfixed-kubernetes-cves
- WEB https://security.netapp.com/advisory/ntap-20211014-0002
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