CVE-2026-56671

{
  "id": "CVE-2026-56671",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-31T06:16:29.860",
  "lastModified": "2026-10-23T23:10:00.157",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "ComfyUI is a modular diffusion model GUI, api and backend with a graph/nodes interface. Prior to 0.28.0, get_model_preview in app/model_manager.py joins an unrestricted filename route capture to a selected model directory without a containment check, allowing an unauthenticated remote attacker to use traversal, encoded traversal, absolute paths, or an unbounded path_index to read image-decodable files and enumerate host paths. get_model_preview (app/model_manager.py) built the path with os.path.join(folder, filename) where filename is an unrestricted {filename:.*} route capture. Literal ../, percent-encoded %2e%2e%2f, and absolute paths all escaped the model directory; path_index was also unbounded. The target file is piped through Pillow and re-encoded as WEBP, so disclosure is limited to image-decodable files plus a file-existence/enumeration oracle (and internal-path leakage via path_index errors). This issue is fixed in version 0.28.0."
    },
    {
      "lang": "es",
      "value": "ComfyUI es una GUI modular de modelo de difusión, API y backend con una interfaz de grafo/nodos. Antes de la versión 0.28.0, get_model_preview en app/model_manager.py une una captura de ruta de nombre de archivo sin restricciones a un directorio de modelo seleccionado sin una verificación de contención, permitiendo a un atacante remoto no autenticado usar recorrido, recorrido codificado, rutas absolutas o un path_index ilimitado para leer archivos decodificables como imagen y enumerar rutas de host. get_model_preview (app/model_manager.py) construyó la ruta con os.path.join(folder, filename) donde filename es una captura de ruta {filename:.*} sin restricciones. .. /  literal, %2e%2e%2f codificado en porcentaje y rutas absolutas escaparon del directorio del modelo; path_index también era ilimitado. El archivo objetivo se canaliza a través de Pillow y se recodifica como WEBP, por lo que la divulgación se limita a archivos decodificables como imagen más un oráculo de existencia/enumeración de archivos (y fuga de rutas internas a través de errores de path_index). Este problema está solucionado en la versión 0.28.0."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Comfy-Org",
          "product": "ComfyUI",
          "versions": [
            {
              "version": "< 0.28.0",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-07-31T23:18:53.402759Z",
          "id": "CVE-2026-56671",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/Comfy-Org/ComfyUI/pull/14734",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/Comfy-Org/ComfyUI/releases/tag/v0.28.0",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/Comfy-Org/ComfyUI/security/advisories/GHSA-pj59-g5vv-74q4",
      "source": "[email protected]"
    }
  ]
}