cpp-httplib: cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library
CVE-2026-34441 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-34441, released March 31, 2026. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| cpp-httplib · Debian 14 | 0.41.0+ds-3 | DEBIAN-CVE-2026-34441 | Mar 31, 2026 |
| cpp-httplib · Fedora 43 | 0.48.0-1.fc43 | FEDORA-2026-1D4BD0354A | Jun 24, 2026 |
| cpp-httplib-devel · Fedora 43 | 0.48.0-1.fc43 | FEDORA-2026-1D4BD0354A | Jun 24, 2026 |
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