The breach started with a single account. One login, more authority than it needed, and a supply chain collapsed. Least privilege could have stopped it.
Least privilege supply chain security is not theory. It is a direct method to reduce risk by granting each account, service, and process only the access required to perform its role. Nothing more. Nothing lingering. No forgotten admin rights waiting to be exploited.
Software supply chains are intricate webs of dependencies, source repositories, build systems, CI/CD pipelines, and deployment infrastructure. Attackers know they can compromise a small element with overextended permissions and pivot into critical systems. By enforcing least privilege policy at every stage, you limit the blast radius of any intrusion.
Start at identity. Every developer account, build agent, API token, and third-party integration should be audited. Remove unused roles. Restrict tokens to specific repositories or packages. Bind credentials to precise actions. Shorten expiration windows.