Security Playgrounds by Adam Leskis

Remote sandboxes for learning and experimentation — fresh Linux VMs, Docker hosts, or Kubernetes clusters in seconds.

Playground on  Security, Linux

GraphQL Security Lab

A stock Django + Strawberry GraphQL API with five classic weaknesses to probe and harden.

Playground on  Kubernetes, Security

OWASP K8s Vulnerable Cluster

This playground presents a k3s cluster that has randomized security vulnerabilities injected based on the OWASP Kubernetes Top 10 list for 2025. Run a scan to find what's wrong, then fix it and get another random vulnerability automatically injected. Play as long as you like!