Why SAST tools need to be customizable to be useful

Scaling an effective application security (AppSec) program is challenging, requiring tools that integrate seamlessly into the developer workflow without adding friction. Customizability in Static Application Security Testing (SAST) tools, as highlighted by Semgrep, is crucial for gaining developer buy-in and enhancing security processes. Modern SAST tools often overwhelm developers with findings, including false positives, which erodes trust. Semgrep emphasizes the need for customizable policies and rules, allowing AppSec engineers to manage the visibility and behavior of findings according to their accuracy and relevance. This customization facilitates a more efficient workflow, enabling developers to focus on actionable issues and improving fix rates. By customizing rules to match specific project needs, organizations can reduce noise and improve the accuracy of their SAST tools. The approach fosters trust in security processes by ensuring developers understand findings and how to address them, ultimately supporting the shift-left movement in AppSec.