Certified Kubernetes Security Specialist (CKS)
The definitive credential for Kubernetes security expertise
What Is the CKS Certification?
The Certified Kubernetes Security Specialist (CKS) is a performance-based exam from the Cloud Native Computing Foundation (CNCF) that validates your expertise in securing Kubernetes clusters and cloud-native applications. The CKS is the most advanced certification in the CNCF lineup and requires a valid CKA before you can register. You will work in live clusters to implement network policies, configure RBAC, scan images for vulnerabilities, set up audit logging, and harden cluster components — all under proctored, timed conditions.
Why CKS Is in Demand
Kubernetes Security Is Critical
As Kubernetes adoption grows, so do attack surfaces. Organizations urgently need professionals who can secure clusters, workloads, and supply chains against evolving threats.
Premium Compensation
CKS holders are among the highest-paid Kubernetes professionals. Security specialization commands a 25–40% premium over general administration roles.
Compliance Requirements
Regulated industries (finance, healthcare, government) increasingly require demonstrated Kubernetes security expertise for audit and compliance purposes.
Supply Chain Security Focus
Recent high-profile supply chain attacks have made software supply chain security a board-level priority. CKS covers image scanning, signing, and admission control.
KubeAstronaut Pathway
CKS is one of five certifications required for the elite KubeAstronaut title. Completing CKS alongside CKA and CKAD covers the performance-based trio.
Career Differentiation
CKS sets you apart from the broader pool of CKA holders. Security specialization opens doors to senior architect, lead, and principal security roles.
CKS Exam Domains
Prioritize your study time based on domain weights.
- Use network security policies to restrict cluster level access
- Use CIS benchmarks to review security configuration
- Properly set up Ingress with TLS termination
- Protect node metadata and endpoints
- Minimize use of, and access to, GUI elements
- Verify platform binaries before deployment
- Restrict access to the Kubernetes API
- Use RBAC to minimize exposure
- Exercise caution in using ServiceAccounts (disable defaults, minimize permissions)
- Keep Kubernetes up to date
- Minimize host OS footprint (reduce attack surface)
- Minimize IAM roles and access
- Minimize external access to the network
- Appropriately use kernel hardening tools (AppArmor, seccomp)
- Set up appropriate OS-level security domains (PSA, SecurityContext)
- Manage Kubernetes Secrets securely
- Use container runtime sandboxes (gVisor, Kata Containers)
- Implement Pod-to-Pod encryption via mTLS
- Minimize base image footprint
- Secure your supply chain (allowlists, image signing)
- Use static analysis of user workloads (e.g., resources, SecurityContexts)
- Scan images for known vulnerabilities (Trivy, etc.)
- Perform behavioral analytics to detect malicious activities
- Perform deep analytical investigation of containers and hosts
- Detect threats within physical infrastructure, apps, networks, data, users, and workloads
- Detect all phases of an attack regardless of where it occurs
- Perform investigation using audit logs and Falco
Your CKS Learning Path
A structured roadmap from zero to certified.
- 1 Earn the CKA First
CKS requires a valid CKA certification. If you haven't passed the CKA yet, start there to build the foundational cluster administration skills that CKS builds upon.
- 2 Learn Kubernetes Security Fundamentals
Study RBAC, Network Policies, Pod Security Admission, SecurityContexts, and Kubernetes audit logging. Understand the security model from API server to kubelet.
- 3 Master Supply Chain & Runtime Security
Practice with image scanning tools (Trivy), admission controllers (OPA Gatekeeper), runtime detection (Falco), and container sandboxing technologies.
- 4 Harden Clusters in Practice Labs
Build intentionally insecure clusters and fix them. Apply CIS benchmarks, implement mTLS, configure AppArmor profiles, and set up audit logging end to end.
- 5 Take Timed CKS Mock Exams
Simulate the real exam environment with performance-based practice tests. Refine your speed with security-specific kubectl commands and documentation lookups.
- 6 Schedule & Pass Your CKS
When you consistently score above 80% on practice exams, book your proctored session. Review Kubernetes security documentation bookmarks one final time before exam day.
Try our CKS mock exams →
CKS Certification-Ready Mock Exam Bundle
Practice in a real Kubernetes cluster environment with performance-based security scenarios covering all six CKS exam domains — built to match the actual exam format.
CKS Guides & Resources
CKS Exam Guide 2026: Kubernetes Security Certification Complete Guide
Complete CKS exam guide covering format, domains, passing score, prerequisites, and what to expect in 2026.
CKS Exam Topics 2026: Supply Chain Security, Runtime Security and More
Detailed breakdown of all CKS exam domains, topics, and key tools tested in 2026.
CKS Prerequisites: Do You Need CKA First? Everything You Need to Know
Complete breakdown of CKS prerequisites, CKA requirement, skills needed, and preparation timeline.
CKS Study Plan: Security-Focused Preparation Guide for 2026
Complete 6-8 week CKS study plan with daily topics, security tools, practice milestones, and resources.
CKS vs KCSA: Which Kubernetes Security Certification is Right for You?
Detailed comparison of CKS and KCSA certifications, helping you choose the right Kubernetes security credential.
Kubernetes Security Best Practices for CKS Exam Prep
Practical Kubernetes security best practices with kubectl commands, YAML examples, and real security implementations.
Frequently Asked Questions
Do I need the CKA to take the CKS?
Yes. An active (non-expired) CKA certification is required before you can register for the CKS exam. This ensures all candidates have foundational Kubernetes administration skills.
How hard is the CKS exam?
The CKS is the most challenging CNCF certification. It builds on CKA knowledge and adds complex security scenarios involving supply chain security, runtime detection, and cluster hardening. Thorough preparation with hands-on labs is essential.
What is the CKS passing score?
The passing score is 67%. Partial credit is awarded, but the security-focused tasks require precision — a misconfigured Network Policy or RBAC rule may not earn partial marks.
How long should I study for the CKS?
Most CKA holders need 4–8 weeks of focused study for the CKS. If you have limited security experience, plan for 8–10 weeks to cover tools like Falco, Trivy, AppArmor, and admission controllers.
Is the CKS exam open book?
Yes. You can access official Kubernetes documentation, the Kubernetes blog, and select tool documentation during the exam. Knowing where to find security-specific documentation quickly is a significant advantage.
What tools should I know for the CKS?
Key tools include Trivy (image scanning), Falco (runtime security), AppArmor and seccomp (kernel hardening), kubeadm (cluster management), and OPA/Gatekeeper or Kyverno (policy enforcement). Familiarity with CIS Kubernetes benchmarks is also essential.
CKS vs KCSA — what is the difference?
KCSA is an entry-level, multiple-choice exam covering security theory. CKS is an advanced, performance-based exam requiring hands-on implementation of security controls in live clusters. CKS also requires CKA as a prerequisite, while KCSA has no prerequisites.