CVE-2026-34441
mediumpriority · track · 26EPSS 0.002 · 9 %ileEUUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
weaknesses
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affected products (2)
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also known as (2)
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sources
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references (6)
External citations — patches, advisories, analysis.
- https://github.com/yhirose/cpp-cnnvd
- https://github.com/yhirose/cpp-httplib/releasesPatchcnnvd
- https://github.com/yhirose/cpp-httplib/releases/tag/v0.40.0enisa_euvd
- https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-jv63-rm9j-6jwcenisa_euvd
- https://github.com/yhirose/cpp-httplib/releases/tag/v0.40.0ProductRelease Notesnvd
- https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-jv63-rm9j-6jwcExploitMitigationVendor Advisorynvd
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