Exam Details
The Linux Foundation · CKS
Secure containerized applications and Kubernetes clusters during build, deployment, and runtime as a Certified Kubernetes Security Specialist.
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Who is this for?
Level: Advanced. This highly technical, performance-based exam focuses exclusively on the intricate security of Kubernetes clusters. Unlike many certifications, the CNCF enforces a strict, mandatory prerequisite: you must hold an active Certified Kubernetes Administrator (CKA) certification to sit for the CKS exam. You should possess deep, hands-on experience with Linux administration, container runtimes, and securing cloud-native supply chains. Are you ready? This is not a theory test. You are fully prepared if you can actively harden cluster configurations, implement strict RBAC, scan images for vulnerabilities, and confidently detect runtime threats using command-line tools. Validate your elite DevSecOps expertise with our highly challenging, scenario-based practice sprints!
Overview
Become the ultimate guardian of cloud-native infrastructure. The Certified Kubernetes Security Specialist (CKS), offered by the Cloud Native Computing Foundation (CNCF), is an elite, performance-based credential that validates your mastery in securing container-based applications and Kubernetes platforms. In today's aggressive IT environment, the rapid adoption of microservices has exponentially expanded the attack surface. A single misconfigured container or compromised image can lead to catastrophic enterprise-wide breaches. Organizations urgently demand specialized security engineers who can proactively defend Kubernetes environments across the entire software development lifecycle. This highly rigorous exam evaluates your practical, hands-on ability to secure clusters during the build, deployment, and runtime phases. You will be intensely tested on critical domains including cluster hardening, minimizing microservice vulnerabilities, securing the software supply chain, implementing robust network policies, and utilizing cutting-edge monitoring and runtime security tools like Falco and Trivy. By earning the CKS credential, you prove to top-tier employers that you possess the rare, tactical skills required to thwart container escapes and mitigate advanced zero-day threats in production. Certified Kubernetes Security Specialists are among the most sought-after and highly compensated professionals in the DevOps and cybersecurity sectors, enjoying unparalleled job security and the authority to lead cloud-native defense strategies in global enterprises. Secure your place at the pinnacle of DevSecOps.
FAQ
The CKS is a performance-based, hands-on exam conducted in a live command-line environment. You are given 2 hours to complete approximately 15–20 realistic security tasks. There are no multiple-choice questions; you must configure network policies, harden binaries, and manage secrets directly on live clusters via the terminal.
The passing score for the CKS is 67%. Unlike some other IT certifications, it does not use a scaled 1000-point system. You earn points for each successfully completed task step. To build the speed and precision required for this hands-on format, ExamOS offers scenario-based practice quizzes that train the management-level logic and security principles required before you hit the lab.
The exam is updated frequently to include the latest Kubernetes security tools (like Falco, Trivy, and AppArmor). The weightings are:
Yes. The CKS is a restricted "Open Book" exam. During the test, you are permitted to access one additional browser tab to view official documentation for:
kubernetes.io/docs)falco.org/docs, aquasecurity.github.io/trivy/)kubernetes.io/blog)
You cannot use Google search or community forums like Stack Overflow.The standard registration fee is $395 USD. This price typically includes the exam voucher and one free retake. If you purchase the exam through a bundle with official training (LFS260), the price may vary. It is recommended to check for CNCF seasonal sales (like Cyber Monday) where discounts can reach 50% or more.
If you do not pass on your first attempt, you are granted one free retake. You must wait until your results are officially released (usually 24 hours) before you can schedule the retake. The second attempt must be completed within 12 months of the original purchase date.
The CKS certification is valid for 2 years. To maintain your status, you must retake and pass the current version of the CKS exam before your expiration date. Because security practices and Kubernetes versions change rapidly, there is no "continuing education" credit option for renewal.
You must hold a current, non-expired Certified Kubernetes Administrator (CKA) certification to take the CKS exam. This is a strict technical prerequisite. The exam is intended for security-focused DevOps engineers and administrators responsible for protecting production-grade container environments.
The CKS is widely regarded as one of the most difficult and prestigious certifications in the cloud-native industry. It qualifies you for high-level roles such as DevSecOps Engineer, Kubernetes Security Lead, and Cloud Architect. As companies move toward "Zero Trust" architectures, the ability to prove you can secure a cluster from the OS level to the application layer makes you a high-value candidate in the enterprise market.
Once you have mastered Kubernetes security, you can further specialize or move into high-level architecture: