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CVE-2026-33768

Estado: AnalizadaCrítica (9.1)—

Astro is a web framework. Prior to version 10.0.2, the @astrojs/vercel serverless entrypoint reads the x-astro-path header and x_astro_path query parameter to rewrite the internal request path, with no authentication whatsoever. On deployments without Edge Middleware, this lets anyone bypass Vercel's platform-level path restrictions entirely. The override preserves the original HTTP method and body, so this isn't limited to GET. POST, PUT, DELETE all land on the rewritten path. A Firewall rule blocking /admin/* does nothing when the request comes in as POST /api/health?x_astro_path=/admin/delete-user. This issue has been patched in version 10.0.2.

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.

Vulnerabilidad de bypass de autenticación en aplicación expuesta (AV:N, PR:N): el header x-astro-path sin validación permite reescribir rutas internas y eludir restricciones de Firewall. Posibilita acceso a recursos administrativos (T1078) y manipulación de datos (POST/PUT/DELETE sin autenticación).

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

Privileged Account ManagementNetwork SegmentationApplication Developer GuidanceActive Directory ConfigurationVulnerability ScanningUser Training

Tecnologías afectadas (1)

Astro — @astrojs/vercel

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2026-33768",
  "cveTags": [],
  "metrics": {
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          "role": "CISA Coordinator",
          "options": [
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              "exploitation": "poc"
            },
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              "automatable": "yes"
            },
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              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2026-03-24T18:53:09.129100Z"
        }
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
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          "value": "CWE-441"
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          "lang": "en",
          "value": "CWE-862"
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      "value": "Astro is a web framework. Prior to version 10.0.2, the @astrojs/vercel serverless entrypoint reads the x-astro-path header and x_astro_path query parameter to rewrite the internal request path, with no authentication whatsoever. On deployments without Edge Middleware, this lets anyone bypass Vercel's platform-level path restrictions entirely. The override preserves the original HTTP method and body, so this isn't limited to GET. POST, PUT, DELETE all land on the rewritten path. A Firewall rule blocking /admin/* does nothing when the request comes in as POST /api/health?x_astro_path=/admin/delete-user. This issue has been patched in version 10.0.2."
    },
    {
      "lang": "es",
      "value": "Astro es un web framework. Antes de la versión 10.0.2, el punto de entrada sin servidor @astrojs/vercel lee la cabecera x-astro-path y el parámetro de consulta x_astro_path para reescribir la ruta de solicitud interna, sin autenticación alguna. En despliegues sin Edge Middleware, esto permite a cualquiera eludir por completo las restricciones de ruta a nivel de plataforma de Vercel. La anulación preserva el método HTTP y el cuerpo originales, por lo que esto no se limita a GET. POST, PUT, DELETE todos aterrizan en la ruta reescrita. Una regla de cortafuegos que bloquea /admin/* no hace nada cuando la solicitud llega como POST /api/health?x_astro_path=/admin/delete-user. Este problema ha sido parcheado en la versión 10.0.2."
    }
  ],
  "lastModified": "2026-06-17T10:38:03.920",
  "configurations": [
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}