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

CVE-2026-42211

Gravedad CVSS v3.1:
ALTA
Tipo:
CWE-502 Deserialización de datos no confiables
Fecha de publicación:
02/06/2026
Última modificación:
02/06/2026

Descripción

*** Pendiente de traducción *** React Router is a router for React. In versions 7.0.0 through 7.14.1, when using Framework Mode, a combination of steps could potentially allow unauthorized remote code execution (RCE) through external requests. This attack requires the application code to have an existing prototype pollution vulnerability, which can then be leveraged in a 2-step attack where the second step triggers unauthorized RCE on the remote server. This does not impact applications using Declarative Mode (``) or Data Mode (`createBrowserRouter/`). This is patched in version 7.14.2.