Attackers do not need your source code. They can poison your dependencies, exploit misconfigured builds, and move through weak CI/CD pipelines until they control what you ship. When Keycloak is part of your identity layer, the blast radius is total. Authorization, authentication, tokens—everything becomes suspect.
Supply chain security for Keycloak means locking down every path that can alter the code before it runs in production. Start with risk mapping. Track every package Keycloak depends on, including transitive dependencies. Review Docker images, Java libraries, and any external modules. Reduce the attack surface by pinning versions and using verified registries.
Implement signed artifacts. GPG or Sigstore can ensure every build output is traceable and untampered. Enforce signature checks in your CI pipelines so no unsigned component enters production. Scan dependencies continuously; do not rely on point-in-time audits. Integrate security scanning into build workflows and fail the build on critical vulnerabilities.