Modern DevSecOps systems depend heavily on the critical Zero Trust Security framework for protecting their environments specifically in CI/CD pipelines. Security models based on perimeter controls differ from Zero Trust because it implements “never trust, always verify” while continuously authenticating users and implementing strict access restrictions and monitoring threats in real time. Development teams enjoy improved software security through Zero Trust implementation within DevSecOps because the security measures are distributed across the complete development cycle from code to deployment. The combination of artificial intelligence and automation enables Zero Trust protection through its ability to detect irregularities along with behavioural pattern analysis and threat prediction functions. The transition of organizations to cloud-native systems and microservices requires Zero Trust as a necessary approach to protect against internal vulnerabilities as well as supply chain attacks and minimize security entry points. A flexible DevSecOps system emerges through identity-based access control combined with continuous monitoring alongside automated security policies which enable businesses to create a resilient and future-proof secure defense system (Thopalle, 2024).