# Unpatched XQUIC Flaw Allows Remote Clients to Crash HTTP/3 Servers

A critical vulnerability in XQUIC, an implementation of the QUIC transport protocol, remains unpatched. It allows remote clients to crash HTTP/3 servers via a specially crafted request, potentially causing widespread denial-of-service conditions. With HTTP/3 adoption increasing, this flaw poses significant risk to affected systems.

**Importance:** 4/5

## Sources

### Security
- [The Hacker News](https://thehackernews.com/2026/07/unpatched-xring-flaw-in-xquic-lets.html) — Fri, 10 Jul 2026 17:17:43 +0530