A container build runs software packaging steps inside an isolated environment, typically using a tool such as Docker or Podman. The build process uses a defined image and dependencies, helping produce consistent results across machines.
In cybersecurity, container builds can improve the portability and repeatability of security tools and operating-system images. They also make the build pipeline part of the supply chain: attackers may target build scripts, dependencies, or container images to introduce malicious components. Teams should review build changes, use trusted inputs, isolate build environments, and verify outputs before deploying or distributing them.