CVE-2023-38545-libcurl-SOCKS5-heap-buffer-overflow

Disclaimer This article is intended solely for technical discussion and learning. Any direct or indirect consequences or losses caused by the use of the information provided herein shall be borne solely by the user. The author assumes no responsibility for such consequences or losses...

CVE-2026-22019-libcurl-HTTP-2-CONNECT-Tunnel-Mixup

CVE-2026-22019 – libcurl HTTP/2 CONNECT Tunnel Mixup Program Code C simulation // curlhttp2tunnelmixup.c - Simulated libcurl handling CONNECT over HTTP/2 include void handlehttp2streamint streamid // Vulnerability: after CONNECT, the proxy mixes streams with the tunneled data if streamid == 0...

thetick

The Tick A simple embedded Linux backdoor. The Tick Compiling Installing Usage Media Compiling The Tick depends only on libcurl, so make sure you have the corresponding development package. For example on Debian based distributions you would do the following: sudo apt-get install libcurl-dev Once...

external_curl_AOSP10_r33_CVE-2021-22924

| | | | | | / | | | | | | | | | || | | | |/|| \| README Curl is a command line tool for transferring data specified with URL syntax. Find out how to use curl by reading the curl.1 man page or the MANUAL document. Find out how to install Curl by reading the INSTALL document. libcurl is the...

CVE-2026-8932

🚨 CVE-2026-8932 - The Oldest libcurl Security Bug Incomplete mTLS Configuration Matching in libcurl The oldest security vulnerability ever fixed in libcurl—remaining unnoticed for over 25 years. 📖 Overview CVE-2026-8932 is a security vulnerability in libcurl where the library may incorrectly reus...

xzf

Introduction xzf is a simple PoC demonstrating how EXIF data can be used for command and control. xzf GETs an image from a predetermined URL, then reads the software tag for an authentication string. If the string matches, xzf will execute anything contained within the ImageDescription tag. Usage...

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...

CVE-2026-33752

CVE-2026-33752 CVE-2026-33752Redirect-based SSRF leading to internal network access in curlcffi Summary curlcffi does not restrict requests to internal IP ranges, and follows redirects automatically via the underlying libcurl. Because of this, an attacker-controlled URL can redirect requests to...

Security Bulletin: Multiple vulnerabilities in IBM MQ Agent images

Summary Multiple vulnerabilities were addressed in IBM MQ Agent images Vulnerability Details CVEID:CVE-2026-104851 DESCRIPTION: fsspec is a specification and Python implementation framework for filesystem interfaces. From 0.9.0 until 2026.6.0, fsspec.implementations.reference.ReferenceFileSystem...

CVE-2026-8932-PoC

CVE-2026-8932 PoC Proof-of-concept reproduction of CVE-2026-8932 , an incomplete mTLS configuration matching issue in libcurl connection reuse. Overview CVE-2026-8932 affects libcurl's connection reuse logic when mutual TLS mTLS configuration changes between requests. Under vulnerable conditions,...

cve-2021-42013

CVE-2021-42013 C implementation of the infamous Apache 2.4.50 exploit Compiling $ gcc cve-2021-42013.c -lcurl -o cve-2021-42013 Using $ ./cve-2021-42013 Example...

CVE-2026-94266

libcurl could accidentally return a URL for curleasygetinfo's CURLINFOEFFECTIVEURL option containing credentials, even though neither the URL provided to libcurl nor the redirected URL did...

CVE-2026-92387

By permanently omitting the final control-response line, a malicious FTP, IMAP, POP3, or SMTP server can exploit libcurl and completely bypass its configured transfer timeout mechanism, indefinitely blocking all concurrent transfers bound to the same multi-handle...

CVE-2026-92388

When an FTP wildcard LIST operation fails, libcurl omits the restoration path meant for successful listings, leaving the write callback set to the internal listing parser and the write callback data pointing directly to the easy handle. Subsequent reuse of this handle triggers an immediate crash,...

CVE-2026-92389

libcurl's TFTP state machine fails to validate state transitions against the requested transfer direction, accepting opening server responses for both reads and writes interchangeably. A malicious TFTP server can respond to a download request in a way that forces the client into transmit mode,...

CVE-2026-92391

A deeply nested multipart MIME structure constructed via the public API causes a stack overflow in libcurl during normal cleanup operations. An excessive recursion depth within curlmimefree leads to unbounded stack frame allocation during structure traversal, ultimately crashing the host process...

CVE-2026-86415

libcurl's connection cache match function never considers the automatic client certificate option, so a cached, already authenticated Schannel connection can be handed to a transfer that got redirected to a different origin, even though the code explicitly switched off the auto client cert option...

CVE-2026-87865

When libcurl uses libssh2 with a hashed knownhosts file, an unrelated initial entry can cause host key validation to report a key mismatch as a missing key to the CURLOPTSSHKEYFUNCTION callback...

CVE-2026-86414

An HTTP proxy can trick libcurl into sending the origin's credentials Basic password, or a Negotiate/Kerberos ticket to the proxy itself, by answering the CONNECT tunnel request with 401 WWW-Authenticate: instead of the expected 407 Proxy-Authenticate:...

CVE-2026-107929

When CURLOPTINTERFACE or the command line tool's --interface option is set with one of the documented prefixes if!, host!, ifhost!, that binding is not part of the connection reuse key, so a later transfer asking for a different source can silently reuse an existing connection and go out from the...