Vulnerabilidad · Publicado 30/09/2026
Apache MINA SSHD, librería Java para SSH cliente-servidor, presenta una vulnerabilidad alta (CVSS 8.1) que permite eludir esquemas de autenticación multifactor configurados en servidores SSH. Afecta principalmente a infraestructuras Java en LATAM que implementan autenticación de múltiples claves públicas. La falla compromete sistemas de acceso remoto en empresas, data centers y plataformas en la nube que dependen de esta librería.
Apache MINA SSHD is a Java library for client-side and server-side SSH. SSH servers can be configured to require multi-authentication schemes, for instance two different public keys, not just one. In OpenSSH, this would be done by setting in sshd_config AuthenticationMethods "publickey,publickey". Apache MINA SSHD provides an equivalent configuration mechanism. In Apache MINA SSHD versions up to 2.19.0 and 3.0.0-M1 to 3.0.0-M5 the server code in component sshd-core does not enforce that the two public keys presented are different. A user can thus successfully authenticate with only one of the two key pairs required by presenting this single key twice. This is a partial authentication bypass. Users are recommended to upgrade to version 2.20.0 or 3.0.0-M6, which fix this issue.
Score: 8.1/10 — Severidad: HIGH — Estado NIST: Received
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CWE-304
Publicado en NIST NVD.