Http11Probe

Http11Probe Http11Probe is a compliance and security tester for HTTP/1.1 servers. It throws malformed, ambiguous, and oversized requests at a server over raw TCP sockets and checks how it responds against what RFC 9110 and RFC 9112 actually require. These are the awkward cases like bare LF line...

http-desync-guardian

Overview HTTP/1.1 went through a long evolution since 1991 to 2014: HTTP/0.9 – 1991 HTTP/1.0 – 1996 HTTP/1.1 RFC 2068 – 1997 RFC 2616 - 1999 RFC 7230 - 2014 This means there is a variety of servers and clients, which might have different views on request boundaries, creating opportunities for...

CLZero

CLZero A project for fuzzing HTTP/1.1 CL.0 Request Smuggling Attack Vectors. About Thank you to @albinowax, @defparam and @d3d else this tool would not exist. Inspired by the tool Smuggler all attack gadgets adapted from Smuggler and...

DEBIAN-CVE-2026-87018

undici is an HTTP client library for Node.js. In versions 4.2.1 through 6.29.0, 7.0.0 through 7.30.0, and 8.0.0 through 8.12.1, the client process crashes when a TLS 1.2 server renegotiates after the connection is established and presents a different, CA-trusted certificate whose hostname does no...

io.netty/netty-codec-http: Netty: Denial of Service via unbounded HttpServerCodec HTTP/1.1 pipeline queue

A flaw was found in Netty's HttpServerCodec. A remote, unauthenticated attacker can exploit this vulnerability by pipelining HTTP/1.1 requests on a single connection and withholding reads. This action causes the methodOverflowQueue to grow without limit, leading to unbounded heap memory consumpti...

jetty: Eclipse Jetty: Information disclosure due to retained HTTP/1.1 trailers across connections

A flaw was found in Eclipse Jetty. This vulnerability allows a remote attacker to cause the server to retain HTTP/1.1 request trailers from a prior connection. Consequently, subsequent requests made over the same connection may unintentionally disclose information by reporting the previously...

io.netty/netty-codec-http: Netty: Unbounded Per-Connection Queue Growth in WebSocketServerExtensionHandler Leads to Denial of Service

A flaw was found in Netty's WebSocketServerExtensionHandler. A remote, unauthenticated attacker can exploit this vulnerability by using HTTP/1.1 pipelining to send requests faster than the application can respond. This leads to an unbounded growth of a per-connection queue, consuming excessive...

io.netty/netty-codec-http: Netty split Transfer-Encoding fields bypass final-chunked validation and enable request smuggling

A flaw was found in Netty's HTTP/1.1 decoder. This vulnerability allows a remote attacker to bypass Transfer-Encoding header validation by splitting the Transfer-Encoding field across multiple headers, with the last field containing a non-final transfer coding like gzip or deflate. This bypass ca...

io.netty/netty-codec-http: Netty: Denial of Service via unbounded queue growth during HTTP request pipelining

A flaw was found in Netty. This vulnerability allows a remote, unauthenticated attacker to cause a Denial of Service DoS by sending numerous pipelined HTTP/1.1 requests over a single connection while withholding reads. Netty's HTTP server codec stores unanswered requests in an internal queue...

CLEANSTART-2026-YV14611 vulnerability occurs when a client sends HTTP/1

Security vulnerability affects the elasticsearch package. The vulnerability occurs when a client sends HTTP/1...

CVE-2026-103930

cpp-httplib is a C++ header-only HTTP/HTTPS library. From 0.29.0 until 0.51.0, Client::openstream in httplib.h accepts a caller-controlled path that reaches detail::writerequestline without the detail::encodepath protection used by the ordinary buffered request path. Raw carriage-return and...

CLEANSTART-2026-IE92648 client may issue specially crafted HTTP/1

Security vulnerability affects the solr package. A client may issue specially crafted HTTP/1...

CVE-2026-61642

Squid is a caching proxy for the Web. From 3.3.0.1 to before 7.6, due to an improper enforcement of behavioral workflow bug, Squid is vulnerable to a Request Smuggling attack against HTTP/1.1 Transfer-Encoding. HTTP header parsing src/HttpHeader.cc accepted the bare Transfer-Encoding: identity...

CVE-2026-61642

Squid is a caching proxy for the Web. From 3.3.0.1 to before 7.6, due to an improper enforcement of behavioral workflow bug, Squid is vulnerable to a Request Smuggling attack against HTTP/1.1 Transfer-Encoding. HTTP header parsing "src/HttpHeader.cc" accepted the bare" Transfer-Encoding:" identit...

EUVD-2026-98919

Squid is a caching proxy for the Web. From 3.3.0.1 to before 7.6, due to an improper enforcement of behavioral workflow bug, Squid is vulnerable to a Request Smuggling attack against HTTP/1.1 Transfer-Encoding. HTTP header parsing src/HttpHeader.cc accepted the bare Transfer-Encoding: identity...

CVE-2026-61642 Squid Request Smuggling in HTTP Transfer-Encoding

Squid is a caching proxy for the Web. From 3.3.0.1 to before 7.6, due to an improper enforcement of behavioral workflow bug, Squid is vulnerable to a Request Smuggling attack against HTTP/1.1 Transfer-Encoding. HTTP header parsing src/HttpHeader.cc accepted the bare Transfer-Encoding: identity...

CVE-2026-61642 Squid Request Smuggling in HTTP Transfer-Encoding

Squid is a caching proxy for the Web. From 3.3.0.1 to before 7.6, due to an improper enforcement of behavioral workflow bug, Squid is vulnerable to a Request Smuggling attack against HTTP/1.1 Transfer-Encoding. HTTP header parsing src/HttpHeader.cc accepted the bare Transfer-Encoding: identity...

Security Bulletin: IBM Terracotta is affected by Jetty vulnerabilities that could allow attackers to bypass security controls, hijack user sessions, or access unauthorized data

Summary IBM Terracotta utilizes Jetty as a lightweight Java-based web server and servlet container that allows developers to run web applications and provide machine-to-machine communications. Vulnerability Details CVEID:CVE-2026-19203 DESCRIPTION: A client may issue specially crafted HTTP/1.1...

CVE-2026-61642: Inconsistent Interpretation of HTTP Requests

Squid is a caching proxy for the Web. From 3.3.0.1 to before 7.6, due to an improper enforcement of behavioral workflow bug, Squid is vulnerable to a Request Smuggling attack against HTTP/1.1 Transfer-Encoding. HTTP header parsing src/HttpHeader.cc accepted the bare Transfer-Encoding: identity...

echteeteepee

HTTP/1 Desync Vulnerability Testing Tools This repository contains defensive security tools for detecting HTTP/1 request smuggling desync vulnerabilities based on groundbreaking research by James Kettle of PortSwigger. Research Attribution This work is directly inspired by and implements techniqu...