Kubernetes makes it easy to run workloads, but it also makes it easy for containers to talk to each other — sometimes more than they should. Network Policies are the firewall rules inside your cluster. They define which pods can speak to which pods, over which ports, under which conditions. Without them, traffic flows unchecked. In regulated environments, that is a risk vector you cannot ignore.
Vendor Risk Management demands strict rules around who can access systems, data, and services. The connection between Kubernetes Network Policies and Vendor Risk Management is direct: enforcing policies reduces the attack surface between workloads controlled by different vendors or teams. It prevents lateral movement if a vendor’s component is compromised. It limits exposure by IP block, namespace, or label.
To integrate Network Policies into a vendor governance framework, start by mapping every pod to its owner and data sensitivity level. Then design deny-all-by-default policies, only allowing explicit communication paths needed for business functions. Audit these policies regularly against your vendor inventory. Every new vendor integration should trigger a policy review.