CVE-2026-34441

cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to version 0.40.0, cpp-httplib is vulnerable to HTTP Request Smuggling. The server's static file handler serves GET responses without consuming the request body. On HTTP/1.1 keep-alive connections, the unread body bytes remain on the TCP stream and are interpreted as the start of a new HTTP request. An attacker can embed an arbitrary HTTP request inside the body of a GET request, which the server processes as a separate request. This issue has been patched in version 0.40.0.

The following products are affected by CVE-2026-34441 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-34441.

URL	Resource
https://github.com/yhirose/cpp-httplib/releases/tag/v0.40.0
https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-jv63-rm9j-6jwc