Nuclei

ProjectDiscovery Nuclei is a fast, highly customizable vulnerability scanner engineered to evaluate web applications, APIs, DNS servers, and cloud infrastructures based on declarative, community-curated YAML templates. Engineered in Go, Nuclei empowers application security engineers, penetration testers, and bug bounty researchers to execute targeted, zero-noise vulnerability assessments at tremendous scale.

The scanner runs natively across Linux, macOS, and Windows systems or within CI/CD pipelines and Docker containers. Core platform features include template-driven scanning logic covering protocols like HTTP, DNS, TCP, SSL, and Websockets, complex multi-step exploitation flows, payload fuzzing, rate limiting, and automated template clustering to eliminate duplicate network requests. With an active global community of thousands of security researchers continuously updating the open-source template repository, Nuclei provides immediate zero-day vulnerability checks within hours of public disclosure.

Enterprise security operations and DevSecOps teams integrate Nuclei directly into GitHub Actions, GitLab CI, and continuous attack surface monitoring pipelines. Primary use cases include detecting misconfigurations, discovering exposed administrative panels, verifying unpatched CVEs across external networks, and enforcing internal infrastructure hardening baselines. Nuclei’s transparent template syntax, non-intrusive scanning capabilities, and ultra-low false-positive rates make it one of the modern cybersecurity ecosystem’s most effective offensive and defensive security testing platforms.