Static secrets in code, config files, or logs are time bombs. In Dynamic Application Security Testing (DAST), exposed tokens are one of the fastest ways to give attackers a free pass. They open the door to production data, CI/CD pipelines, cloud infrastructure, and every high-value system you care about. One leaked API token can bypass most controls you’ve spent years building.
The cost of a stolen token isn’t theoretical. Breaches traced to API key leaks are rising every quarter. DAST tools now routinely scan application behavior, endpoints, and traffic for any sign of leaked credentials. They catch tokens in responses, hidden parameters, JavaScript bundles, or error messages. A token exposure found during DAST means it was live, active, and reachable — which makes remediation urgent.
A proper API token strategy goes beyond hiding keys in .env files. You need token rotation on short lifetimes, strict scoping, and anomaly detection to identify abuse in real time. In the context of DAST, safe tokens mean scheduling active scans that hit both authenticated and unauthenticated surfaces. That means stripping tokens from public responses, never embedding them on the client side, and ensuring revoked credentials cannot be used again.