review-security-k8s-namespaces

To audit Kubernetes namespaces for security misconfigurations, you must evaluate structural isolation, detect system namespace abuse, and analyze cross-namespace resource references to prevent lateral movement and enforce boundary defense.

Common Kubernetes namespace security risks include poor workload isolation, improper mixing of trust levels like dev and prod, system namespace abuse, and dangerous cross-namespace references that expose clusters to lateral movement.

Detecting policy bypasses and rogue namespaces requires evaluating configurations for OPA exemptions, privileged security contexts, and excessive privileges that attempt to circumvent multi-tenancy standards and boundary defense policies.

Checking for cross-namespace vulnerabilities involves flagging dangerous resource references, identifying dangling secrets, and locating service accounts that increase the attack surface and compromise workload isolation.

You can validate Kubernetes multi-tenancy compliance by analyzing namespace configurations to ensure proper workload isolation, detect trust level mixing, and prevent unauthorized policy bypasses in production environments.

Namespace-level isolation limitations include the risk of structural density issues, dangling secrets, and cross-namespace resource references that can still allow lateral movement if boundary defense policies are not strictly enforced.