Kubernetes: API Server DoS (crash?) if many large resources (~1MB each) are concurrently/repeatedly sent to an external Validating WebHook endpoint

Report Submission Form Summary: I was trying to explore a way to stealthily send lots of data outside a private GKE cluster by way of misusing the Validating Webhook mechanism. The idea would be that a cluster-admin could install a webhook and then initiate resources like a secret or configmap th...