HTTP3-attacks

HTTP3-attacks CVE-2022-30592 Based on the work: E. Chatzoglou, V. Kouliaridis, G. Kambourakis, G. Karopoulos, and S. Gritzalis,"A hands-on gaze on HTTP/3 security through the lens of HTTP/2 and a public dataset", Computers & Security, p. 103051, 2022. The current repository serves the purpose of...

ssh3

!NOTE SSH3 is probably going to change its name. It is still the SSH Connection Protocol RFC4254 running on top of HTTP/3 Extended connect, but the required changes are heavy and too distant from the philosophy of popular SSH implementations to be considered for integration. The specification dra...

CVE-2026-4253-Scanner

CVE-2026-42530 — Safe-Check Scanner Non-destructive mass scanner for the NGINX HTTP/3 QUIC use-after-free Inventory which of your hosts are exposed — without ever triggering the bug. ⚠️ Disclaimer This tool is for authorized security testing only — your own infrastructure, or systems you have...

HTTP3ONSTEROIDS

Table of contents Vulnerability Description Source Code Review Lab Setup Identifying the issue References Vulnerability Description HAProxy's HTTP/3 implementation fails to block a malformed HTTP header field name , and when deployed in front of a server that incorrectly process this malformed...

CVE-2026-42530

CVE-2026-42530 Scanner for CVE-2026-42530, a use-after-free in nginx's HTTP/3 module. Affected: nginx 1.31.0, 1.31.1 Fixed: nginx 1.31.2 Usage root@kitploit: pip install aioquic python3 scannerCVE-2026-42530.py port python3 scannerCVE-2026-42530.py --file hosts.txt How it works Opens two QPACK...

CVE-2026-56816

A flaw was found in Netty. An unauthenticated remote attacker can exploit a vulnerability in Netty's Http3FrameCodec by sending specially crafted HTTP/3 reserved frames with excessive payload lengths. This can lead to uncontrolled memory buffering, causing memory exhaustion and a denial of servic...

CVE-2026-42530

🛡️ CVE-2026-42530 - NGINX HTTP/3 QUIC Use-After-Free Vulnerability High-Severity Use-After-Free in NGINX HTTP/3 QUIC ⚠️ QPACK Encoder Stream Vulnerability 🔍 Overview CVE-2026-42530 is a use-after-free vulnerability in NGINX's ngxhttpv3module. A remote unauthenticated attacker can trigger it by...

PT-2026-92035

NGINX Plus and NGINX Open Source have a vulnerability in the ngx http v3 module module. When using HTTP/3 with OpenSSL versions = OpenSSL 3.5.0 under certain configurations, a limited heap buffer overflow could happen while processing a TLS handshake. This can happen in a non-deterministic manner...

EUVD-2026-77618

webtransport-go is an implementation of the WebTransport protocol. Prior to 0.11.1, Session.parseNextCapsule in session.go skips an unknown WebTransport capsule on the HTTP/3 request stream by calling io.ReadAll on the capsule reader, retaining the complete declared capsule body in memory. A...

CVE-2026-57497 webtransport-go: Memory Exhaustion Attack due to Buffering of Unknown Capsules

webtransport-go is an implementation of the WebTransport protocol. Prior to 0.11.1, Session.parseNextCapsule in session.go skips an unknown WebTransport capsule on the HTTP/3 request stream by calling io.ReadAll on the capsule reader, retaining the complete declared capsule body in memory. A...

CVE-2026-57497 webtransport-go: Memory Exhaustion Attack due to Buffering of Unknown Capsules

webtransport-go is an implementation of the WebTransport protocol. Prior to 0.11.1, Session.parseNextCapsule in session.go skips an unknown WebTransport capsule on the HTTP/3 request stream by calling io.ReadAll on the capsule reader, retaining the complete declared capsule body in memory. A...

CVE-2026-90678

A flaw was found in HAProxy. A remote, unauthenticated attacker can exploit a vulnerability in the HTTP/3 multiplexer when processing requests without a Content-Length header, leading to HTTP request smuggling. This occurs when HAProxy is configured with QUIC support and an HTTP/3 frontend, and...

CVE-2026-90678

An issue was discovered in HAProxy 3.3.0 through 3.4.4 and in 3.5-dev1 through 3.5-dev5. Exploitation requires an HTTP/3 frontend: HAProxy must be built with QUIC support and configured with a QUIC bind listener, and the affected traffic must reach a backend over HTTP/1.1 using chunked transfer...

Linux Distros Unpatched Vulnerability : CVE-2026-90678

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - An issue was discovered in HAProxy 3.3.0 through 3.4.4 and in 3.5-dev1 through 3.5-dev5. Exploitation requires an HTTP/3 frontend: HAProxy must be built with QU...

CVE-2026-90678

An issue was discovered in HAProxy 3.3.0 through 3.4.4 and in 3.5-dev1 through 3.5-dev5. Exploitation requires an HTTP/3 frontend: HAProxy must be built with QUIC support and configured with a QUIC bind listener, and the affected traffic must reach a backend over HTTP/1.1 using chunked transfer...

CVE-2026-90678

An issue was discovered in HAProxy 3.3.0 through 3.4.4 and in 3.5-dev1 through 3.5-dev5. Exploitation requires an HTTP/3 frontend: HAProxy must be built with QUIC support and configured with a QUIC bind listener, and the affected traffic must reach a backend over HTTP/1.1 using chunked transfer...

EUVD-2026-76943

An issue was discovered in HAProxy 3.3.0 through 3.4.4 and in 3.5-dev1 through 3.5-dev5. Exploitation requires an HTTP/3 frontend: HAProxy must be built with QUIC support and configured with a QUIC bind listener, and the affected traffic must reach a backend over HTTP/1.1 using chunked transfer...

CVE-2026-90678

An issue was discovered in HAProxy 3.3.0 through 3.4.4 and in 3.5-dev1 through 3.5-dev5. Exploitation requires an HTTP/3 frontend: HAProxy must be built with QUIC support and configured with a QUIC bind listener, and the affected traffic must reach a backend over HTTP/1.1 using chunked transfer...

PT-2026-90786

An issue was discovered in HAProxy 3.3.0 through 3.4.4 and in 3.5-dev1 through 3.5-dev5. Exploitation requires an HTTP/3 frontend: HAProxy must be built with QUIC support and configured with a QUIC bind listener, and the affected traffic must reach a backend over HTTP/1.1 using chunked transfer...

CVE-2026-88878

A flaw was found in Traefik, an HTTP reverse proxy and load balancer. When HTTP/3 is enabled, an unauthenticated remote client can exploit a timeout bypass vulnerability by trickling request body bytes. This allows the client to hold a request open indefinitely, exhausting backend connection pool...