Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

CVE-2025-15346

Gravedad CVSS v4.0:
CRÍTICA
Tipo:
CWE-287 Autenticación incorrecta
Fecha de publicación:
08/01/2026
Última modificación:
08/01/2026

Descripción

*** Pendiente de traducción *** A vulnerability in the handling of verify_mode = CERT_REQUIRED in the wolfssl Python package (wolfssl-py) causes client certificate requirements to not be fully enforced. <br /> <br /> Because the WOLFSSL_VERIFY_FAIL_IF_NO_PEER_CERT flag was not included, the behavior effectively matched CERT_OPTIONAL: a peer certificate was verified if presented, but connections were incorrectly authenticated when no client certificate was provided. <br /> <br /> This results in improper authentication, allowing attackers to bypass mutual TLS (mTLS) client authentication by omitting a client certificate during the TLS handshake. <br /> <br /> The issue affects versions up to and including 5.8.2.