> ## Documentation Index
> Fetch the complete documentation index at: https://rootea.es/llms.txt
> Use this file to discover all available pages before exploring further.

# HTTP/2 request splitting via CRLF injection

> PortSwigger Web Security Academy lab: HTTP/2 request splitting via CRLF injection. Topic: HTTP Request Smuggling.

<p className="machine-summary"><span className="prompt"><code>\$ tldr</code></span> PortSwigger · HTTP Request Smuggling</p>

<div className="machine-meta">
  | ·            | ·                                                                                                                                     |
  | ------------ | ------------------------------------------------------------------------------------------------------------------------------------- |
  | Platform     | PortSwigger Web Security Academy                                                                                                      |
  | Topic        | HTTP Request Smuggling                                                                                                                |
  | Difficulty   | <span className="dbadge dbadge-medium">PRACTITIONER</span>                                                                            |
  | Official lab | [Open](https://portswigger.net/web-security/request-smuggling/advanced/lab-request-smuggling-h2-request-splitting-via-crlf-injection) |
</div>

## Solve the lab

| Language | Author          | Format | Link                                                                                                                                  |
| -------- | --------------- | ------ | ------------------------------------------------------------------------------------------------------------------------------------- |
| 🇬🇧 EN  | **PortSwigger** | Texto  | [Open](https://portswigger.net/web-security/request-smuggling/advanced/lab-request-smuggling-h2-request-splitting-via-crlf-injection) |

## Resources by skill

| Skill                  | Source      | Link                                                           |
| ---------------------- | ----------- | -------------------------------------------------------------- |
| HTTP Request Smuggling | PortSwigger | [Open](https://portswigger.net/web-security/request-smuggling) |

## Related skills

[HTTP Request Smuggling](/en/skills/request-smuggling)

***

## Comments & tips

Solved this lab a different way? Share it here — comments live in [GitHub Discussions](https://github.com/FFuson/HTB_Writeups/discussions).

<div className="rootea-giscus-wrap" data-giscus-term="lab:request-smuggling-advanced-request-smuggling-h2-request-splitting-via-crlf-injection" data-giscus-lang="en" />

*Last updated: 2026-05-08*

<script type="application/ld+json">
  {`{"@context":"https://schema.org","@type":"TechArticle","name":"HTTP/2 request splitting via CRLF injection","headline":"HTTP/2 request splitting via CRLF injection — PortSwigger lab index","url":"https://rootea.es/en/portswigger/labs/request-smuggling/advanced-request-smuggling-h2-request-splitting-via-crlf-injection","inLanguage":"en","about":[{"@type":"Thing","name":"PortSwigger Web Security Academy"},{"@type":"Thing","name":"HTTP Request Smuggling"}],"isPartOf":{"@type":"WebSite","name":"rootea.es","url":"https://rootea.es"},"author":{"@type":"Organization","name":"rootea.es"}}`}
</script>