K8s Security Scanning and CIS Benchmark Compliance: A Complete Hardening Guide from kube-bench to Production
Overview You manage a K8s cluster where the API Server has --anonymous-auth=true, etcd certificates are world-readable at 644, and the kubelet --read-only-port=10255 is still open. Each of these looks like a “minor issue” on its own, but an attacker who gets one foothold can pivot through the entire cluster. This isn’t hypothetical — the CNCF 2025 annual survey showed that over 90% of production K8s clusters have at least one CIS Benchmark-level configuration deficiency....