Static application security testing (SAST) is an essential method for detecting security vulnerabilities in software development, particularly within the context of CI/CD pipelines. By analyzing application code without executing it, SAST identifies potential threats early in the development process, allowing developers to address issues before they affect live environments. This proactive approach not only enhances application security but also supports regulatory compliance and creates a more secure software supply chain. Tools such as CircleCI offer seamless integration of SAST into CI/CD workflows, facilitating automated scans and real-time feedback on vulnerabilities across multiple programming languages and frameworks. However, SAST should be part of a broader security strategy that includes dynamic application security testing (DAST), interactive application security testing (IAST), and continuous security updates, forming a comprehensive DevSecOps pipeline to ensure robust protection against potential security breaches.