CVE-2026-123577

Hickory DNS versions 0.24.0 before 0.26.2 are vulnerable to a resource exhaustion flaw. Remote attackers can exploit unbounded DoH request bodies to consume server memory by sending large request bodies over HTTP/2 or HTTP/3 to a DNS over HTTP server. This vulnerability can lead to a denial of se...

CVE-2026-123575

Hickory DNS versions before 0.26.2 are vulnerable to a resource exhaustion issue in the DNS-over-HTTPS (DoH) HTTP/2 server. The root cause is a lack of sufficient timeouts or limits for incomplete request bodies . A remote attacker can exploit this by opening DoH connections and sending incomplet...

CVE-2024-24549

Here’s a README.md for a Proof of Concept PoC demonstrating the Denial of Service DoS vulnerability in Apache Tomcat due to improper input validation of HTTP/2 requests: Proof of Concept PoC for Denial of Service DoS Vulnerability in Apache Tomcat This repository contains a Proof of Concept PoC...

CVE-2026-42945

CVE-2026-42945 PoC Go 中文 | English A detection and exploitation helper for nginx HTTP/2 CVE-2026-42945. Use it only in authorized environments to verify vulnerability presence, compare patched vs. vulnerable behavior, and reproduce PoC logic in a controlled lab. Affected versions heuristic: nginx...

CVE-2026-49975

CVE-2026-49975 HTTP/2 Bomb ★ CVE-2026-49975 HTTP/2 Bomb PoC ★ Overview CVE-2026-49975 is a Denial of Service DoS vulnerability in Apache HTTP Server. The vulnerability occurs in the HTTP/2 request handling path, where multiple cookie header fields can be merged without being properly counted...

http-request-smuggler

HTTP Request Smuggler This Burp Suite extension automatically detects and exploits HTTP Request Smuggling vulnerabilities using advanced desynchronization techniques developed by PortSwigger researcher James Kettle. It supports comprehensive scanning for HTTP/1.1 and HTTP/2-downgrade desync...

CVE-2023-44487

Please note that the above code uses the libcurl library for making HTTP requests. You need to install libcurl and link against it when compiling the code. The code is a simplified version, and you may need to adjust it based on your exact requirements and the specific behavior of the HTTP/2 atta...

golang-CVE-2023-44487

Golang CVE-2023-44487 testing This repository contains testing resources and results for the CVE-2023-44487. It uses a modified version of https://github.com/secengjeff/rapidresetclient to test against various Golang server configs. Testing against a normal server go run server.go go run...

Tomcat-CVE-2025-31650

CVE-2025-31650 🚨 Proof of Concept PoC for Apache Tomcat HTTP/2 DoS vulnerability CVE-2025-31650 This script triggers a memory exhaustion condition in Apache Tomcat by sending malformed priority headers over HTTP/2. 🎯 Affected Versions Apache Tomcat 9.0.76 – 9.0.102 Apache Tomcat 10.1.10 – 10.1.39...

kubesploit

Kubesploit Kubesploit is a cross-platform post-exploitation HTTP/2 Command & Control server and agent dedicated for containerized environments written in Golang and built on top of Merlin project by Russel Van Tuyl @Ne0nd0g. Our Motivation While researching Docker and Kubernetes, we noticed that...

CVE-2023-44487

CVE-2023-44487 Basic vulnerability scanning to see if web servers may be vulnerable to CVE-2023-44487 This tool checks to see if a website is vulnerable to CVE-2023-44487 completely non-invasively. 1. The tool checks if a web server accepts HTTP/2 requests without downgrading them 2. If the web...

http2smugl

http2smugl This tool helps to detect and exploit HTTP request smuggling in cases it can be achieved via HTTP/2 - HTTP/1.1 conversion by the frontend server. The scheme is as follows: 1. An attacker sends a crafted HTTP/2 request to the target server, which we call frontend. 2. The request is...

h2csmuggler

h2cSmuggler Description h2cSmuggler smuggles HTTP traffic past insecure edge-server proxypass configurations by establishing HTTP/2 cleartext h2c communications with h2c-compatible back-end servers, allowing a bypass of proxy rules and access controls. See my detailed write-up below for: Technica...

CVE-2026-87045

A NULL pointer dereference exists in the Zephyr HTTP/2 server within subsys/net/lib/http/http_server_http2.c. The vulnerability occurs because handle_http_frame_header() unconditionally sets client->current_stream = NULL, but CONTINUATION frames do not re-bind the stream. This leads to a NULL ...

CVE-2026-87045 NULL pointer dereference in the Zephyr HTTP/2 server when a header block is completed by a CONTINUATION frame

The HTTP/2 server in subsys/net/lib/http/httpserverhttp2.c clears the connection's stream binding at the start of every frame. handlehttpframeheader executed client-currentstream = NULL unconditionally, but a CONTINUATION frame does not open a new stream and enterhttpframecontinuationstate never...

CVE-2026-87045 NULL pointer dereference in the Zephyr HTTP/2 server when a header block is completed by a CONTINUATION frame

The HTTP/2 server in subsys/net/lib/http/httpserverhttp2.c clears the connection's stream binding at the start of every frame. handlehttpframeheader executed client-currentstream = NULL unconditionally, but a CONTINUATION frame does not open a new stream and enterhttpframecontinuationstate never...

EUVD-2026-118102

Allocation of Resources Without Limits or Throttling vulnerability in ninenines cowlib allows an unauthenticated remote peer to exhaust the memory of an HTTP/2 endpoint via HPACK-indexed header fields. cowhttp2machine:headersdecode/4 in src/cowhttp2machine.erl decodes every HEADERS block with...

CVE-2026-113431 Unbounded decoded HTTP/2 header-list size in cowlib cow_http2_machine enables HPACK amplification memory exhaustion

Allocation of Resources Without Limits or Throttling vulnerability in ninenines cowlib allows an unauthenticated remote peer to exhaust the memory of an HTTP/2 endpoint via HPACK-indexed header fields. cowhttp2machine:headersdecode/4 in src/cowhttp2machine.erl decodes every HEADERS block with...

CVE-2026-113431

The cowlib library (from version 2.7.0 onward) contains an Allocation of Resources Without Limits or Throttling vulnerability (CWE-770) in the cow_http2_machine component. The root cause is that the headers_decode/4 function fails to bound the size of the decoded header list as required by RFC 91...

CVE-2026-113431 Unbounded decoded HTTP/2 header-list size in cowlib cow_http2_machine enables HPACK amplification memory exhaustion

Allocation of Resources Without Limits or Throttling vulnerability in ninenines cowlib allows an unauthenticated remote peer to exhaust the memory of an HTTP/2 endpoint via HPACK-indexed header fields. cowhttp2machine:headersdecode/4 in src/cowhttp2machine.erl decodes every HEADERS block with...