CodeQL
Semantic code analysis engine that compiles source code into queryable databases to discover vulnerabilities with QL queries.
Technical Architecture & Overview
CodeQL is a semantic code analysis engine that turns source code into queryable databases. Security researchers and developers write QL queries to detect bugs, vulnerabilities, and anti-patterns. The CLI is free for open-source repositories and requires a commercial license for private code analysis.
Targeted Technical Use Cases
Use CodeQL to perform static analysis of codebases, search for custom vulnerability patterns, and gate pull requests in GitHub.
Evaluation & Trade-offs
Core Strengths
- +Turns source code into a queryable database for data-flow analysis.
- +QL queries are reusable and can be shared across projects and teams.
- +GitHub code scanning runs CodeQL on pull requests, free for public repositories and part of GitHub Code Security for private ones.
Trade-Offs & Limitations
- -Requires a paid GitHub license for private repositories and advanced features.
- -For compiled languages, database creation monitors the normal build process, so the code must build.
Defensive Security Application
Use CodeQL to identify and fix complex data-flow vulnerabilities before attackers can exploit them.
Frequently Asked Questions
What is CodeQL?→
CodeQL is a semantic code analysis engine that turns source code into queryable databases. Security researchers and developers write QL queries to detect bugs, vulnerabilities, and anti-patterns. The CLI is free for open-source repositories and requires a commercial license for private code analysis.
What is CodeQL used for?→
Use CodeQL to perform static analysis of codebases, search for custom vulnerability patterns, and gate pull requests in GitHub.
What are the strengths of CodeQL?→
- +Turns source code into a queryable database for data-flow analysis.
- +QL queries are reusable and can be shared across projects and teams.
- +GitHub code scanning runs CodeQL on pull requests, free for public repositories and part of GitHub Code Security for private ones.
What are the limitations of CodeQL?→
- +Requires a paid GitHub license for private repositories and advanced features.
- +For compiled languages, database creation monitors the normal build process, so the code must build.
How is CodeQL used defensively?→
Use CodeQL to identify and fix complex data-flow vulnerabilities before attackers can exploit them.