CVE-2026-66753

EIP tracks 1 public exploit for CVE-2026-66753. PoCs published by theopaid.

AI-analyzed exploit summary This repository provides a detailed technical analysis of CVE-2026-66753, an HTTP header injection vulnerability in the tiny_http Rust library due to unvalidated CR and LF characters in header values. The writeup includes root cause analysis, patch diffs, and a functional proof-of-concept demonstrating header splitting via crafted input.

tiny-http through 0.12.0 contains an HTTP header injection vulnerability that allows attackers to inject carriage return (0x0D) and line feed (0x0A) bytes into HTTP header values on both request and response sides due to insufficient validation in header parsing and serialization. Attackers can exploit this injection primitive to perform response splitting, cache poisoning, session fixation via Set-Cookie injection, security header override, and request smuggling against line-feed-tolerant backends.