Writing Custom SAST Rules for Vulnerabilities Your Scanner Doesn't Cover

Every SAST tool ships with a default ruleset. And every default ruleset has gaps. Sometimes the gap is a framework-specific vulnerability that the tool's authors didn't anticipate. Sometimes it's an internal pattern unique to your organisation — a custom authentication library, a legacy data access layer, a home-grown serialisation format that every engineer knows is sensitive but no off-the-shelf rule covers. This is the article where I show you how to close those gaps using the YAML rule engin