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projectdiscovery/nuclei

This system is a modular vulnerability scanner and security assessment platform that executes templates across diverse protocols including HTTP, DNS, SSL, and headless browsers. It features a comprehensive JavaScript runtime for complex template logic and supports remote execution via WMI, DCOM, and Task Scheduler. The architecture includes a robust template management system with signing, caching, and multi-source loading, alongside extensive fuzzing and input parsing capabilities.

59.7

Adequate · 6 August 2026

86k

lines of production code

Go

primary language

4

bus factor · 290 authors in all

3

measurements over time

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How it got here

2020–2023 · Nuclei v3 SDK and engine rewrite

This period was defined by the comprehensive rewrite of the Nuclei engine to support a modular, multi-protocol execution framework and a public Go SDK. The work introduced a new template execution model with workflow support, expanded protocol coverage including SSL, WHOIS, and file operations, and integrated advanced JavaScript capabilities for template logic.

111 changes

2024–2026 · JavaScript bindings and fuzzing engine

This period focused on expanding the JavaScript runtime with extensive libraries for Active Directory attacks, remote execution, and network protocols, alongside the introduction of a modular fuzzing engine. The team also standardized input handling and authentication strategies to support diverse data sources and security testing workflows.

53 changes

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About this page

  • The description of this project is derived from its own commit history, not from its README.
  • The score is its highest published measurement, taken on 6 August 2026 at a pinned commit. It is not a live figure and does not change until the project is measured again.
  • Measured at commit 64bc83e004 — the exact code this score is about.
  • Scored under rubric rubric-2026.08.19. Score the same commit under that rubric and you get the same number.
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