CVE-2026-67181

EIP tracks 1 public exploit for CVE-2026-67181. PoCs published by theopaid.

AI-analyzed exploit summary Detailed technical analysis of CVE-2026-67181, an HTTP request smuggling vulnerability in the rouille web framework's proxy module due to inconsistent handling of Transfer-Encoding headers. The writeup includes root cause analysis, patch diffs, and a functional proof-of-concept demonstrating the desynchronization attack.

Rouille 0.3.3 through 3.6.2 contains an HTTP request smuggling vulnerability that allows remote attackers to desynchronize HTTP message boundaries by exploiting improper header forwarding in the proxy implementation. The proxy in src/proxy.rs forwards the client's Transfer-Encoding header to upstream backends unchanged while transmitting a body already de-chunked by tiny_http, enabling CL.TE desynchronization attacks where attackers control where the backend believes the request body ends.