Nuclei is a modern, high-performance vulnerability scanner that leverages simple YAML-based templates. It empowers you to design custom vulnerability detection scenarios that mimic real-world conditions, leading to zero false positives.

• Simple YAML format for creating and customizing vulnerability templates.
• Contributed by thousands of security professionals to tackle trending vulnerabilities.
• Reduce false positives by simulating real-world steps to verify a vulnerability.
• Ultra-fast parallel scan processing and request clustering.
• Integrate into CI/CD pipelines for vulnerability detection and regression testing.
• Supports multiple protocols like TCP, DNS, HTTP, SSL, WHOIS, JavaScript, Code and more.
• Integrate with Jira, Splunk, GitHub, Elastic, GitLab.

Table of Contents

• Get Started
  • 1. Nuclei CLI
  • 2. Pro and Enterprise Editions
• Documentation
  • Command Line Flags
  • Single target scan
  • Scanning multiple targets
  • Network scan
  • Scanning with your custom template
  • Connect Nuclei to ProjectDiscovery_
• Nuclei Templates, Community and Rewards 💎
• Our Mission
• Contributors ❤
• License

Get Started

1. Nuclei CLI

Install Nuclei on your machine. Get started by following the installation guide here. Additionally, we provide a free cloud tier that comes with generous monthly free limits:

• Store and visualize your vulnerability findings
• Write and manage your Nuclei templates
• Access the latest Nuclei templates
• Discover and store your targets

[!Important]

This project is in active development. Expect breaking changes with releases. Review the release changelog before updating.
This project is primarily built to be used as a standalone CLI tool. Running nuclei as a service may pose security risks. It's recommended to use with caution and additional security measures.

2. Pro and Enterprise Editions

For security teams and enterprises, we provide a cloud-hosted service built on top of Nuclei OSS, fine-tuned to help you continuously run vulnerability scans at scale with your team and existing workflows:

• 50x faster scans
• Large scale scanning with high accuracy
• Integrations with cloud services (AWS, GCP, Azure, Cloudflare, Fastly, Terraform, Kubernetes)
• Jira, Slack, Linear, APIs and Webhooks
• Executive and compliance reporting
• Plus: Real-time scanning, SAML SSO, SOC 2 compliant platform (with EU and US hosting options), shared team workspaces, and more
• We're constantly adding new features!
• Ideal for: Pentesters, security teams, and enterprises

Sign up to Pro or Talk to our team if you have a large organization and complex requirements.

Documentation

Browse the full Nuclei documentation here. If you’re new to Nuclei, check out our foundational YouTube series.

Installation

nuclei requires go >= 1.24.2 to install successfully. Run the following command to get the repo:

go install -v github.com/projectdiscovery/nuclei/v3/cmd/nuclei@latest

To learn more about installing nuclei, see https://docs.projectdiscovery.io/tools/nuclei/install.

Command Line Flags

To display all the flags for the tool:

nuclei -h

Nuclei is a fast, template based vulnerability scanner focusing
on extensive configurability, massive extensibility and ease of use.

Usage:
  ./nuclei [flags]