Buildpacks Move the Container Hardening Control Point Away From the Dockerfile
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Buildpacks moving hardening control point is a key platform engineering insight.
Summary
Cloud Native Buildpacks, which graduated within the CNCF in July 2026, shift container hardening control from per-service Dockerfiles to platform engineering by decoupling runtime base images from application layers. The rebase command rewrites OCI manifest digests in milliseconds, bypassing full rebuilds and CI queues for OS-level patches. Vendors like BellSoft, Chainguard, and Docker now compete on builder security and SLA-backed remediation, with Docker making its hardened image catalogue free under Apache 2.0 in December 2025.