Docker Hardened Images

Why It Matters

Using hardened images limits what an attacker can do if a container is breached, improving runtime security and supply-chain integrity, though it requires changes to development workflows and build processes. This trade-off makes hardened images a practical control for organizations prioritizing production security.

Summary

Hardened Docker images are minimal container images curated to reduce attack surface by including only the runtime and essential files required to run an application. Unlike typical images that bundle package managers and shells, hardened variants may omit npm, Yarn or even a shell, requiring multi-stage builds or separate dev variants to install dependencies. Docker and the industry position these images for production workloads where supply-chain tightness and containment of compromises are priorities.

Original Description

Docker has released some free images as part of their hardened images program.

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