Fiche vulnérabilité
CVE-2026-21428 : faille élevée yhirose cpp-httplib (CVSS 7.5)
Description
cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to version 0.30.0, the ``write_headers`` function does not check for CR & LF characters in user supplied headers, allowing untrusted header value to escape header lines. This vulnerability allows attackers to add extra headers, modify request body unexpectedly & trigger an SSRF attack. When combined with a server that supports http1.1 pipelining (springboot, python twisted etc), this can be used for server side request forgery (SSRF). Version 0.30.0 fixes this issue.
En bref
- Sévérité
- Élevée (CVSS 7.5)
- Vecteur CVSS
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- Exploitation active
- Non signalée par la CISA
- Publication
- 1 janv. 2026
- Dernière mise à jour
- 17 juin 2026
Produits concernés
- yhirose cpp-httplib