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  Docker Security: Best Practices and Image Scanning 📅 Published: Feb 2026 ⏱️ Estimated Reading Time: 18 minutes 🏷️ Tags: Docker Security, Container Security, Image Scanning, DevSecOps, Container Hardening Introduction: The Security Challenge Containers share the host kernel. A vulnerability in a container can potentially affect other containers and the host itself. Unlike virtual machines, which have strong isolation boundaries, containers rely on proper configuration and security practices. Docker security is not automatic. You must actively secure your images, containers, and the Docker daemon. This guide covers the essential security practices you need to protect your containerized applications. Part 1: The Shared Responsibility Model Who Is Responsible for What Component Responsibility Docker Daemon Docker and host administrator Host OS Host administrator Base Images Image maintainer and you Application Code You Runtime Configuration You Network Security You Secrets Manageme...