A delivery pipeline without Zero Trust is a target painted in bright red. Threats no longer respect the boundaries of firewalls or VPNs. They crawl inside through compromised credentials, supply chain flaws, and careless merges. The only safe assumption is that every component, every user, and every service is untrusted until proven otherwise — and proven again, continuously.
The Zero Trust Maturity Model for delivery pipelines is not theory. It is a sequence of concrete, measurable security stages. It begins with verification before build, not after. It enforces least privilege for every automated action, developer account, and API key. It eliminates shared secrets from source repositories. It makes provenance and integrity checks as much a part of CI/CD as compiling code.
At the Initial stage, security gates are ad-hoc. Manual approvals stand between code and deployment, but secrets leak in logs and unused keys stay active. At the Developing stage, automated scans and artifact signing appear. Access begins to align with roles, but enforcement is partial. The Advanced stage shifts to immutable infrastructure, continuous verification, workload identity, and strong attestations across every step. Finally, the Optimized stage treats trust as ephemeral, rotates credentials in minutes, and integrates runtime detection into the deployment flow itself. Every commit, build, and deploy is challenged, verified, and cryptographically proven.