Improving Your K8s Security: Upgrade Your Clusters and Avoid Exposure

Research identified a large number of Kubernetes API servers visible on the Internet (over 750,000), many exposing version information (≈90,000) and a substantial portion (26% of visible-version clusters) running likely unsupported releases; the author warns this increases exposure to known CVEs and recommends restricting API access, planning regular upgrades (ideally every 3 months, minimum 9–12 months), and clarifying cloud provider shared responsibility.