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CVE-2026-34200

Estado: AnalizadaAlta (7.7)—

Nhost is an open source Firebase alternative with GraphQL. Prior to version 1.41.0, The Nhost CLI MCP server, when explicitly configured to listen on a network port, applies no inbound authentication and does not enforce strict CORS. This allows a malicious website visited on the same machine to issue cross-origin requests to the MCP server and invoke privileged tools using the developer's locally configured credentials. This vulnerability requires two explicit, non-default configuration steps to be exploitable. The default nhost mcp start configuration is not affected. This issue has been patched in version 1.41.0.

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.

XSS/CSRF desde navegador malicioso (AT:P, UI:P) requiere interacción del usuario visitando sitio web. Resulta en acceso con credenciales del desarrollador y ejecución de herramientas privilegiadas en contexto local.

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 ManagementApplication Developer GuidanceActive Directory ConfigurationUser TrainingUser Account ManagementRestrict Web-Based Content

Tecnologías afectadas (1)

Nhost — CLI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-34200",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-34200",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-03-31T14:30:33.127356Z"
        }
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          "attackVector": "NETWORK",
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          "valueDensity": "NOT_DEFINED",
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          "exploitMaturity": "NOT_DEFINED",
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          "subIntegrityImpact": "NONE",
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          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "vulnAvailabilityImpact": "HIGH",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "subConfidentialityImpact": "NONE",
          "vulnConfidentialityImpact": "HIGH",
          "confidentialityRequirement": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
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  "affected": [
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      "affectedData": [
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          "versions": [
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              "version": "< 1.41.0"
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  "published": "2026-03-31T15:16:17.670",
  "references": [
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      "tags": [
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    },
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      "url": "https://github.com/nhost/nhost/security/advisories/GHSA-6c5x-3h35-vvw2",
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        "Vendor Advisory"
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      "source": "security-advisories@github.com"
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      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "source": "security-advisories@github.com",
      "description": [
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          "value": "CWE-306"
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          "value": "CWE-942"
        }
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    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
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          "lang": "en",
          "value": "CWE-306"
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      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Nhost is an open source Firebase alternative with GraphQL. Prior to version 1.41.0, The Nhost CLI MCP server, when explicitly configured to listen on a network port, applies no inbound authentication and does not enforce strict CORS. This allows a malicious website visited on the same machine to issue cross-origin requests to the MCP server and invoke privileged tools using the developer's locally configured credentials. This vulnerability requires two explicit, non-default configuration steps to be exploitable. The default nhost mcp start configuration is not affected. This issue has been patched in version 1.41.0."
    },
    {
      "lang": "es",
      "value": "Nhost es una alternativa de código abierto a Firebase con GraphQL. Antes de la versión 1.41.0, el servidor MCP de Nhost CLI, cuando se configura explícitamente para escuchar en un puerto de red, no aplica autenticación de entrada y no impone CORS estricto. Esto permite que un sitio web malicioso visitado en la misma máquina emita solicitudes de origen cruzado al servidor MCP e invoque herramientas privilegiadas utilizando las credenciales configuradas localmente por el desarrollador. Esta vulnerabilidad requiere dos pasos de configuración explícitos y no predeterminados para ser explotable. La configuración predeterminada de inicio de nhost mcp no se ve afectada. Este problema ha sido parcheado en la versión 1.41.0."
    }
  ],
  "lastModified": "2026-07-24T21:10:00.143",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "matchCriteriaId": "6449E6F2-0FEB-4CB5-AE5B-B22FDB55BA81",
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}