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CVE-2026-34789

Estado: Pendiente de análisisAlta (7)—

FreeCAD is a free and open-source multiplatform 3D parametric modeler. Prior to 1.1.2, src/App/PropertyPythonObject.cpp in PropertyPythonObject::Restore() passes the attacker-controlled module attribute from serialized PropertyPythonObject XML directly to PyImport_ImportModule() while restoring a crafted FCStd document, which executes module-level Python code, and the legacy pickle branch also imports an attacker-controlled module and invokes its class constructor through PyObject_CallObject(). This issue is fixed in version 1.1.2.

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.

Vector AV:L/UI:R indica ejecución en cliente tras interacción (abrir FCStd preparado). CWE-94 y descripción confirman inyección de código Python sin restricciones en PropertyPythonObject::Restore().

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)

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

Freecadweb — FreecadAI

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-34789",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-34789",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-08-18T00:00:00+00:00"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "HIGH",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "FreeCAD",
          "product": "FreeCAD",
          "versions": [
            {
              "status": "affected",
              "version": "< 1.1.2"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-08-17T21:16:44.403",
  "references": [
    {
      "url": "https://github.com/FreeCAD/FreeCAD/commit/81b73925ce22610542367301d8eff4259eb9596e",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/FreeCAD/FreeCAD/commit/983037f3003dc31f48db36705b86fb3fbe026295",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/FreeCAD/FreeCAD/commit/e2dc6c8172673642c6856b8b3a5a6accefb18279",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/FreeCAD/FreeCAD/releases/tag/1.1.2",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/FreeCAD/FreeCAD/security/advisories/GHSA-493w-pp4h-h77v",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/FreeCAD/FreeCAD/security/advisories/GHSA-493w-pp4h-h77v",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-94"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "FreeCAD is a free and open-source multiplatform 3D parametric modeler. Prior to 1.1.2, src/App/PropertyPythonObject.cpp in PropertyPythonObject::Restore() passes the attacker-controlled module attribute from serialized PropertyPythonObject XML directly to PyImport_ImportModule() while restoring a crafted FCStd document, which executes module-level Python code, and the legacy pickle branch also imports an attacker-controlled module and invokes its class constructor through PyObject_CallObject(). This issue is fixed in version 1.1.2."
    }
  ],
  "lastModified": "2026-09-09T21:11:25.743",
  "sourceIdentifier": "security-advisories@github.com"
}