Kubernetes Security Best Practices 2026: Complete Hardening Guide

Short summary

Comprehensive hardening guide covering four critical Kubernetes security layers: RBAC with least-privilege service accounts, Pod Security Admission policies, zero-trust network policies, and container image vulnerability scanning. Includes production-ready YAML manifests and kubectl commands for EKS, GKE, AKS, and bare-metal deployments. Addresses preventable misconfigurations causing 60% of production K8s security incidents.

• •RBAC least-privilege: namespace-scoped roles, dedicated service accounts, explicit verbs/resources instead of wildcards
• •Pod Security Admission replaces deprecated PSPs for namespace-level pod security enforcement
• •Zero-trust network policies and image vulnerability scanning with Trivy in CI/CD pipelines

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