Cloudflare Identifies Race Condition in hyper’s HTTP/1 Implementation

Renato Losio — Sun, 12 Jul 2026 06:18:00 GMT

Cloudflare recently documented how its development team identified and fixed a rare bug in the widely used Rust HTTP library hyper that could silently truncate large HTTP responses while still returning a successful 200 OK status. The issue had existed for years, was triggered only under specific timing conditions, and has now been fixed upstream.

By Renato Losio

InfoQ - Open Source

Cloudflare Identifies Race Condition in hyper’s HTTP/1 Implementation