Vulnerabilidad · Publicado 30/09/2026
Apache MINA SSHD, librería Java para implementar servidores SSH, contiene una vulnerabilidad crítica (CVSS 9.1) que permite eludir la autenticación en configuraciones específicas de autenticación asincrónica. Afecta principalmente a servidores SSH personalizados en entornos de infraestructura crítica, plataformas de acceso remoto y soluciones de integración en LATAM. La explotación podría comprometer la integridad de sistemas de gestión de infraestructura, bases de datos y servidores de aplicaciones.
Authentication bypass in sshd-core in Apache MINA SSHD versions 2.0.0 to 2.19.0 and 3.0.0-M1 to 3.0.0-M5 for a certain (presumed rare) way to implement an SSH server. Apache MINA SSHD is a Java library for client- and server-side SSH. In the server part of the library, a mechanism to perform "asynchronous authentication" exists. A server implemented with Apache MINA SSHD must contain explicit code to make use of this feature. The implementation of this feature was flawed and could potentially lead to skipping checking the signature in public-key or hostbased authentication, or returning a wrong result. Users are recommended to upgrade to Apache MINA SSHD 2.20.0 or 3.0.0-M6, which fix the logic error and which additionally forbid the use of this "asynchronous authentication" mechanism with the public-key or hostbased authentication schemes: if used, the SSH session will be closed and the server will log an entry indicating that asynchronous authentication may be used only with password or keyboard-interactive authentication.
Score: 9.1/10 — Severidad: CRITICAL — Estado NIST: Received
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE-305
Publicado en NIST NVD.