A codebase scan is an automated inspection of source code to find security issues, exposed secrets, and risky patterns. The scan may look for hardcoded passwords, weak cryptography, injection-prone input handling, unsafe deserialization, or dependency references that introduce known vulnerabilities. Some tools analyze a repository statically, while others combine source review with secrets detection and policy checks.
In cyber security, codebase scans matter because they help teams catch problems before software is shipped or deployed. They are widely used in secure development pipelines, pull request review, and supply chain defense. Attackers also benefit from the same idea: they scan public repositories, leaked code, or stolen source trees to locate credentials, hidden admin paths, and exploitable flaws. A scan is useful, but it is not a substitute for human review; context, false positives, and business logic issues still require validation by a security engineer or developer.