A half-blind Server Side Request Forgery (SSRF) vulnerability exists in kube-controller-manager when using the in-tree Portworx StorageClass. This vulnerability allows authorized users to leak arbitrary information from unprotected endpoints in the control plane’s host network (including link-local or loopback services).
https://groups.google.com/g/kubernetes-security-announce/c/EORqZg0k1l4/m/TtD-q0v7AgAJ