H2C Smuggling in the Wild

Published

2021-03-18 00:00

Collected

2026-10-07 18:05

---
id: 9050
title: "H2C Smuggling in the Wild"
source_domain: slcyber.io
source_url: "https://www.slcyber.io/research/h2c-smuggling-in-the-wild"
published_at: "2021-03-18T00:00:00Z"
tags: ["vulnerability-research", "web-security", "request-smuggling", "proxy", "h2c"]
phying_url: "https://phying.com/item/9050"
lang: en
---

# H2C Smuggling in the Wild

## Summary

H2C smuggling technique exploited against real-world proxies and load balancers to bypass authentication and access internal endpoints.

## Intelligence Metadata

- **Sources:** slcyber.io
- **Published:** 2021-03-18T00:00:00Z
- **Original:** https://www.slcyber.io/research/h2c-smuggling-in-the-wild
- **Phying News:** https://phying.com/item/9050