What is Dynamic Application Security Testing (DAST)?

Dynamic Application Security Testing (DAST) is a pivotal approach in modern application security that assesses applications in their runtime environment to identify potential vulnerabilities, simulating real-world attack scenarios without accessing the source code. This method complements other security testing approaches, such as Static Application Security Testing (SAST), Interactive Application Security Testing (IAST), and Software Composition Analysis (SCA), by focusing on runtime flaws like SQL Injection and Cross-Site Scripting (XSS), which may not be apparent through static analysis alone. DAST is favored for its low false positive rates and ability to provide realistic testing conditions, making it essential for evaluating security in applications that rely heavily on APIs and complex interactions. While DAST has limitations, such as late-stage implementation challenges and difficulties with Single Page Applications, its integration with CI/CD pipelines and developer-centric tools enhances its effectiveness. StackHawk exemplifies a modern DAST platform that offers insights into API security, supporting developers in securing applications more efficiently by starting from the source code and revealing the entire API landscape.