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Nuclei is a fast, customizable vulnerability scanner powered by the global security community and built on a simple YAML-based DSL, enabling collaboration to tackle trending vulnerabilities on the internet. It helps you find vulnerabilities in your applications, APIs, networks, DNS, and cloud configurations.
A transparent discovery signal based on current public GitHub metadata.
This score does not audit code, security, maintainers, documentation quality, or suitability. Verify the repository and its current documentation before adoption.
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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.
Install Nuclei on your machine. Get started by following the installation guide here. Additionally, We provide a free cloud tier and comes with a generous monthly free limits:
[!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.
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:
adding new features!Sign up to Pro or Talk to our team if you have large organization and complex requirements.
Browse the full Nuclei documentation here. If you’re new to Nuclei, check out our foundational YouTube series.
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.
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]
Flags:
TARGET:
-u, -target string[] target URLs/hosts to scan
-l, -list string path to file containing a list of target URLs/hosts to scan (one per line)
-eh, -exclude-hosts string[] hosts to exclude to scan from the input list (ip, cidr, hostname)
-resume string resume scan from and save to specified file (clustering will be disabled)
-sa, -scan-all-ips scan all the IP's associated with dns record
-iv, -ip-version string[] IP version to scan of hostname (4,6) - (default 4)
TARGET-FORMAT:
-im, -input-mode string mode of input file (list, burp, jsonl, yaml, openapi, swagger) (default "list")
-ro, -required-only use only required fields in input format when generating requests
-sfv, -skip-format-validation skip format validation (like missing vars) when parsing input file
TEMPLATES:
-nt, -new-templates run only new templates added in latest nuclei-templates release
-ntv, -new-templates-version string[] run new templates added in specific version
-as, -automatic-scan automatic web scan using wappalyzer technology detection to tags mapping
-t, -templates string[] list of template or template directory to run (comma-separated, file)
-turl, -template-url string[] template url or list containing template urls to run (comma-separated, file)
-ai, -prompt string generate and run template using ai prompt
-w, -workflows string[] list of workflow or workflow directory to run (comma-separated, file)
-wurl, -workflow-url string[] workflow url or list containing workflow urls to run (comma-separated, file)
-validate validate the passed templates to nuclei
-nss, -no-strict-syntax disable strict syntax check on templates
-td, -template-display displays the templates content
-tl list all templates matching current filters
-tgl list all available tags
-sign signs the templates with the private key defined in NUCLEI_SIGNATURE_PRIVATE_KEY env variable
-code enable loading code protocol-based templates
-dut, -disable-unsigned-templates disable running unsigned templates or templates with mismatched signature
-esc, -enable-self-contained enable loading self-contained templates
-egm, -enable-global-matchers enable loading global matchers templates
-file enable loading file templates
FILTERING:
-a, -author string[] templates to run based on authors (comma-separated, file)
-tags string[] templates to run based on tags (comma-separated, file)
-etags, -exclude-tags string[] templates to exclude based on tags (comma-separated, file)
-itags, -include-tags string[] tags to be executed even if they are excluded either by default or configuration
-id, -template-id string[] templates to run based on template ids (comma-separated, file, allow-wildcard)
-eid, -exclude-id string[] templates to exclude based on template ids (comma-separated, file)
-it, -include-templates string[] path to template file or directory to be executed even if they are excluded either by default or configuration
-et, -exclude-templates string[] path to template file or directory to exclude (comma-separated, file)
-em, -exclude-matchers string[] template matchers to exclude in result
-s, -severity value[] templates to run based on severity. Possible values: info, low, medium, high, critical, unknown
-es, -exclude-severity value[] templates to exclude based on severity. Possible values: info, low, medium, high, critical, unknown
-pt, -type value[] templates to run based on protocol type. Possible values: dns, file, http, headless, tcp, workflow, ssl, websocket, whois, code, javascript
-ept, -exclude-type value[] templates to exclude based on protocol type. Possible values: dns, file, http, headless, tcp, workflow, ssl, websocket, whois, code, javascript
-tc, -template-condition string[] templates to run based on expression condition
OUTP