VulnAPI vs WuppieFuzz

VulnAPI is a free, open-source dynamic application security testing tool for scanning APIs for vulnerabilities and security risks. It can scan from a curl-like CLI, OpenAPI contracts, or a GraphQL endpoint. The product page says it detects all ten OWASP API Security Top 10 categories out of the box; listed test areas include API discovery, authentication, authorization, input validation, and business logic. Reports identify risk level, vulnerability, description, and the operation where a finding occurred. Findings also include the triggering request and remediation steps in plain language. Teams can tailor assessments to their needs and run scans in GitHub Actions, GitLab CI, or Jenkins. Pre-built binaries and installation instructions are provided for Linux, Windows, and macOS, with Docker also available; deployment is self-hosted. The scanner collects anonymous usage data about scan counts and detected vulnerability counts and severity, but a command-line flag lets users opt out. Proxy settings can be supplied through HTTP_PROXY or HTTPS_PROXY environment variables or a --proxy argument. The tool is released under the MIT License and is free to use, modify, and distribute for educational and testing purposes.

WuppieFuzz is a free, open-source, self-hosted REST API fuzzer built on LibAFL. It generates and mutates requests from an OpenAPI specification to seek potential errors and security flaws. Black-box, grey-box, and white-box testing are supported, along with authentication and input-validation testing. Authentication formats include Bearer, custom, cookie, OAuth, and Web Fuzzing Commons. Code coverage is supported for Java, JavaScript, and Python, while code coverage reports currently support JaCoCo. The tool can produce endpoint coverage reports, and a Grafana dashboard can visualize request information from a fuzzing campaign. It runs on Windows, macOS, and Linux and uses the Apache 2.0 license. TNO says fuzzing data is not shared with TNO or third parties. The tool is described for software development, supply-chain quality control, or penetration testing. WuppieFuzz requires an OpenAPI document in JSON or YAML to generate requests, and API discovery is not supported. Its plan costs nothing.