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CVE-2026-45582

Estado: AnalizadaMedia (6.5)—

n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.51.3, the workflow telemetry sanitizer could retain partial fragments of URL-shaped node parameters before sending workflow data to the project's anonymous telemetry backend. Values placed in HTTP-Request-style node parameters — such as customer or tenant identifiers, short secrets embedded in query strings, and signed request parameters — could therefore appear in stored telemetry, contrary to the collection boundary documented in PRIVACY.md. This vulnerability is fixed in 2.51.3.

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).

Tecnologías afectadas (1)

N8n-mcp — N8n-mcp

CWE

Referencias

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{
  "id": "CVE-2026-45582",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-45582",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-05-29T18:44:38.040272Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.5,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "czlonkowski",
          "product": "n8n-mcp",
          "versions": [
            {
              "status": "affected",
              "version": "< 2.51.3"
            }
          ]
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    }
  ],
  "published": "2026-05-29T14:16:30.563",
  "references": [
    {
      "url": "https://github.com/czlonkowski/n8n-mcp/commit/6cf6fef653fcd6d598f2f356aac4754931c7329f",
      "tags": [
        "Patch"
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      "url": "https://github.com/czlonkowski/n8n-mcp/pull/782",
      "tags": [
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        "Patch"
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      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.51.3",
      "tags": [
        "Product",
        "Release Notes"
      ],
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-f3rg-xqjj-cj9w",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-201"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.51.3, the workflow telemetry sanitizer could retain partial fragments of URL-shaped node parameters before sending workflow data to the project's anonymous telemetry backend. Values placed in HTTP-Request-style node parameters — such as customer or tenant identifiers, short secrets embedded in query strings, and signed request parameters — could therefore appear in stored telemetry, contrary to the collection boundary documented in PRIVACY.md. This vulnerability is fixed in 2.51.3."
    },
    {
      "lang": "es",
      "value": "n8n-MCP es un servidor MCP que proporciona a los asistentes de IA acceso a la documentación, propiedades y operaciones de los nodos n8n. Antes de la versión 2.51.3, el saneador de telemetría de flujos de trabajo podía retener fragmentos parciales de parámetros de nodo con forma de URL antes de enviar los datos del flujo de trabajo al backend de telemetría anónima del proyecto. Los valores colocados en parámetros de nodo de estilo HTTP-Request — como identificadores de cliente o inquilino, secretos cortos incrustados en cadenas de consulta y parámetros de solicitud firmados — podían, por lo tanto, aparecer en la telemetría almacenada, en contra del límite de recopilación documentado en PRIVACY.md. Esta vulnerabilidad está corregida en la versión 2.51.3."
    }
  ],
  "lastModified": "2026-07-21T12:10:00.090",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:n8n-mcp:n8n-mcp:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "5692C0AE-4633-443D-BFE0-CC15797A4EDD",
              "versionEndExcluding": "2.51.3"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security-advisories@github.com"
}