Static application security testing, or SAST, analyzes source code, bytecode, or compiled artifacts to find potential security weaknesses without running the application. It matters because finding flaws earlier in development is usually cheaper and easier than discovering them after release.
What is Static Application Security Testing (SAST)?
SAST tools inspect application code for patterns associated with security weaknesses such as injection risk, unsafe data handling, insecure authentication logic, and poor input validation. It is commonly used during development and code review workflows to catch issues before production.
What SAST Commonly Finds
Common findings include hardcoded secrets, unsafe function use, weak validation logic, insecure error handling, and code patterns associated with common vulnerability classes.
SAST vs. DAST
SAST examines code without executing the application. DAST tests a running application from the outside by interacting with it during execution.
Frequently Asked Questions
Why is SAST valuable?
Because it helps teams shift security feedback earlier into the software lifecycle and reduce avoidable weaknesses before deployment.
Does SAST catch every application issue?
No. It is useful, but it may miss runtime issues, business logic flaws, and environment-specific risks.
Related Cybersecurity Terms
- Application Security (AppSec)
- Dynamic Application Security Testing (DAST)
- Secure Software Development Lifecycle (SSDLC)
- Software Composition Analysis (SCA)
