CVE-2026-42221highCWE-306

CVE-2026-42221: fallo de gravedad alta en 0xJacky nginx-ui

nginx-ui: Unauthenticated First-Run Installer Allows Remote Initial Admin Claim

Publicada el · Actualizada el

Seguir esta CVE+ Monitorear nginx-ui+ Monitorear github.com/0xJacky/Nginx-UI

Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.

56Vexday Risk Score

Corrige pronto. Ella tiene exploit funcional público.

ssvc Attendcvss 8.1epss 1.3%
de la publicación al arma50 días
Publicada en NVD4 may
1ª PoC+50d
Nginx UI is a web user interface for the Nginx web server. From version 2.0.0 to before version 2.3.8, an unauthenticated network attacker can claim the initial administrator account on a fresh nginx-ui instance during the first-run setup window. The public /api/install endpoint is reachable without authentication, and the request-encryption flow only protects payload confidentiality in transit; it does not authenticate who is allowed to perform installation. A remote attacker who reaches the service before the legitimate operator can set the admin email, username, and password, causing permanent initial-instance takeover. This issue has been patched in version 2.3.8.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Productos afectados
0xJacky · nginx-ui
⚠ Recursos públicos, para evaluar la exposición de sistemas que controlas o estás autorizado a probar. Prueba solo con autorización.
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