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Glossary

KSPM: Kubernetes Security Posture Management Explained

KSPM continuously monitors Kubernetes clusters for security misconfigurations in RBAC, pod security, network policies, and workload settings.

Akash Mahajan
#kspm #kubernetes #cloud-security #rbac #pod-security #container-security

What is KSPM?

Kubernetes Security Posture Management (KSPM) is a specialized form of security monitoring focused on Kubernetes clusters. It continuously scans cluster configurations — RBAC policies, pod security settings, network policies, secrets management, and workload configurations — to identify security risks before they become breaches.

Think of KSPM as CSPM specifically for Kubernetes. Where CSPM checks your cloud provider configurations (S3 buckets, security groups, IAM roles), KSPM checks the configurations inside your K8s clusters (pods running as root, missing network policies, overly permissive service accounts).

Why It Matters

Kubernetes introduces a new layer of configuration complexity on top of cloud infrastructure. A single cluster can have hundreds of pods, dozens of namespaces, and thousands of RBAC bindings. Default Kubernetes settings are permissive by design — pods can communicate with any other pod, containers run as root unless explicitly restricted, and service accounts often have more permissions than needed.

Common KSPM findings include:

  • Containers running as root or with privileged escalation enabled
  • Missing network policies allowing unrestricted pod-to-pod communication
  • RBAC roles granting cluster-admin to non-admin users
  • Secrets stored unencrypted in etcd
  • Pod security standards not enforced at the namespace level
  • Workloads pulling images from untrusted registries

How It Works / Key Concepts

KSPM tools connect to the Kubernetes API server and evaluate cluster state against security benchmarks:

CIS Kubernetes Benchmark — The most widely used standard, covering master node security, worker node configuration, RBAC, pod security, and network policies.

Pod Security Standards — Kubernetes-native policies (Privileged, Baseline, Restricted) that define acceptable pod configurations.

Custom Policies — Organization-specific rules like “no containers from public registries in production” or “all namespaces must have resource quotas.”

A typical KSPM scan evaluates:

  1. Cluster configuration — API server flags, etcd encryption, admission controllers
  2. RBAC analysis — Who can do what, overly broad ClusterRoleBindings, unused service accounts
  3. Workload security — Security contexts, resource limits, image sources, volume mounts
  4. Network segmentation — Network policies per namespace, ingress/egress rules
  5. Secrets management — How secrets are stored, rotated, and accessed

KSPM vs CSPM

KSPM and CSPM are complementary, not competing:

LayerToolExample Finding
Cloud infrastructureCSPMEKS cluster endpoint is publicly accessible
Kubernetes clusterKSPMDefault service account has cluster-admin role

You need both — CSPM for the cloud resources hosting your cluster, KSPM for what’s running inside it.

How Kloudle Helps

Kloudle includes Kubernetes security checks as part of its multi-cloud scanning — covering RBAC misconfigurations, pod security issues, and network policy gaps alongside your AWS, GCP, and Azure infrastructure. With 1,890 checks across 5 providers and sovereign deployment options, you get unified CSPM and KSPM without sending cluster configuration data to a third party.

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