Often referred to as white-box testing—is a security methodology that analyzes an application’s source code, byte code, or binaries while the program is at rest. By examining the blueprint of the software without actually executing it, SAST identifies security flaws such as SQL injection, buffer overflows, and hardcoded credentials early in the development process. It serves as a microscopic lens, allowing developers to see vulnerabilities in the very lines of code they are writing.
Essential SAST Terminology
| Term | Definition |
| False Positive | A security alert that identifies a non-existent vulnerability, requiring manual developer review. |
| Shift Left | The practice of moving security testing to the earliest possible point in the development cycle. |
| Sinks and Sources | Sources are where untrusted data enters a program; Sinks are where that data is used (e.g., a database query). |
| White-Box Testing | A testing method where the internal structure, design, and implementation of the item being tested are known. |
Why SAST is Critical
- Developer Education: Provides immediate feedback to developers, helping them learn secure coding habits in real-time.
- Full Coverage: Can scan 100% of the codebase, including paths that might not be easily reachable during execution.
- Early Intervention: Since it doesn’t require a running environment, it can be triggered as soon as a developer “commits” code.