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CVE-2026-25905

Estado: AplazadaMedia (5.8)—

The Python code being run by 'runPython' or 'runPythonAsync' is not isolated from the rest of the JS code, allowing any Python code to use the Pyodide APIs to modify the JS environment. This may result in an attacker hijacking the MCP server - for malicious purposes including MCP tool shadowing. Note - the "mcp-run-python" project is archived and unlikely to receive a fix.

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)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Mcp-run-python — Mcp-run-pythonAI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-25905",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-25905",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-02-09T12:55:11.621045Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "reefs@jfrog.com",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 5.8,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:L",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "HIGH",
          "availabilityImpact": "LOW",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 3.7,
        "exploitabilityScore": 1.6
      }
    ]
  },
  "affected": [
    {
      "source": "reefs@jfrog.com",
      "affectedData": [
        {
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "versionType": "python"
            }
          ],
          "packageName": "mcp-run-python",
          "collectionURL": "https://pypi.org/project/pip"
        }
      ]
    }
  ],
  "published": "2026-02-09T09:16:34.030",
  "references": [
    {
      "url": "https://research.jfrog.com/vulnerabilities/mcp-run-python-lack-of-isolation-mcp-takeover-jfsa-2026-001653030/",
      "source": "reefs@jfrog.com"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "reefs@jfrog.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-653"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Python code being run by 'runPython' or 'runPythonAsync' is not isolated from the rest of the JS code, allowing any Python code to use the Pyodide APIs to modify the JS environment. This may result in an attacker hijacking the MCP server - for malicious purposes including MCP tool shadowing. Note - the \"mcp-run-python\" project is archived and unlikely to receive a fix."
    },
    {
      "lang": "es",
      "value": "El código Python ejecutado por 'runPython' o 'runPythonAsync' no está aislado del resto del código JS, permitiendo que cualquier código Python utilice las API de Pyodide para modificar el entorno JS. Esto puede resultar en que un atacante secuestre el servidor MCP - con fines maliciosos, incluida la suplantación de herramientas MCP. Nota - el proyecto \"mcp-run-python\" está archivado y es poco probable que reciba una solución."
    }
  ],
  "lastModified": "2026-06-17T10:25:24.907",
  "sourceIdentifier": "reefs@jfrog.com"
}