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CVE-2026-31854

Estado: AnalizadaAlta (8.7)—

Cursor is a code editor built for programming with AI. Prior to 2.0 ,if a visited website contains maliciously crafted instructions, the model may attempt to follow them in order to “assist” the user. When combined with a bypass of the command whitelist mechanism, such indirect prompt injections could result in commands being executed automatically, without the user’s explicit intent, thereby posing a significant security risk. This vulnerability is fixed in 2.0.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Requiere interacción del usuario (UI:P) al visitar sitio malicioso con inyección de prompt. Ejecuta comandos automáticamente (CWE-78, T1059) sin intención explícita del usuario, típico de T1203 (explotación para ejecución en cliente).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Restrict Web-Based ContentPrivileged Account ManagementLimit Software InstallationExecution PreventionBehavior Prevention on EndpointDisable or Remove Feature or Program

Tecnologías afectadas (1)

Anysphere — Cursor

CWE

Referencias

JSON original (NVD)

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          "options": [
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              "technicalImpact": "total"
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    },
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      "value": "Cursor es un editor de código diseñado para programar con IA. Antes de 2.0, si un sitio web visitado contiene instrucciones creadas maliciosamente, el modelo podría intentar seguirlas para 'asistir' al usuario. Cuando se combina con una omisión del mecanismo de lista blanca de comandos, tales inyecciones de prompt indirectas podrían resultar en la ejecución automática de comandos, sin la intención explícita del usuario, lo que representa un riesgo de seguridad significativo. Esta vulnerabilidad se ha corregido en 2.0."
    }
  ],
  "lastModified": "2026-06-17T10:34:38.353",
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