Fiche vulnérabilité
CVE-2025-12642 : faille critique lighttpd lighttpd (CVSS 9.1)
Description
lighttpd1.4.80 incorrectly merged trailer fields into headers after http request parsing. This behavior can be exploited to conduct HTTP Header Smuggling attacks. Successful exploitation may allow an attacker to: * Bypass access control rules * Inject unsafe input into backend logic that trusts request headers * Execute HTTP Request Smuggling attacks under some conditions This issue affects lighttpd1.4.80
En bref
- Sévérité
- Critique (CVSS 9.1)
- Vecteur CVSS
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- Exploitation active
- Non signalée par la CISA
- Publication
- 3 nov. 2025
- Dernière mise à jour
- 17 juin 2026
Produits concernés
- lighttpd lighttpd