CVE-2026-53755

{
  "id": "CVE-2026-53755",
  "sourceIdentifier": "[email protected]",
  "published": "2026-06-23T19:17:07.477",
  "lastModified": "2026-10-25T23:10:00.167",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Crawl4AI is an open-source LLM friendly web crawler & scraper. Prior to 0.8.9, the Docker API server applied its SSRF destination check to the crawl target URL only, not to the proxy address. An unauthenticated request could supply a proxy pointing at an internal IP and route the browser through it, reaching internal services and cloud-metadata endpoints, while using a perfectly valid crawl URL. The Docker API is unauthenticated by default. /crawl, /crawl/stream, and /crawl/job accept a browser_config (and crawler_config). The following all feed Chromium's egress and were unchecked: browser_config.proxy_config.server, browser_config.proxy (deprecated field), crawler_config.proxy_config.server, and --proxy-server / --proxy-pac-url / --proxy-bypass-list / --host-resolver-rules flags in browser_config.extra_args. This vulnerability is fixed in 0.8.9."
    },
    {
      "lang": "es",
      "value": "Crawl4AI es un rastreador y extractor web de código abierto compatible con LLM. Antes de la versión 0.8.9, el servidor API de Docker aplicaba su verificación de destino SSRF solo a la URL objetivo de rastreo, no a la dirección del proxy. Una solicitud no autenticada podría proporcionar un proxy que apunte a una IP interna y enrutar el navegador a través de él, alcanzando servicios internos y puntos finales de metadatos en la nube, mientras se utilizaba una URL de rastreo perfectamente válida. La API de Docker no está autenticada por defecto. /crawl, /crawl/stream y /crawl/job aceptan una browser_config (y crawler_config). Los siguientes alimentaban la salida de Chromium y no se verificaban: browser_config.proxy_config.server, browser_config.proxy (campo obsoleto), crawler_config.proxy_config.server, y los flags --proxy-server / --proxy-pac-url / --proxy-bypass-list / --host-resolver-rules en browser_config.extra_args. Esta vulnerabilidad está corregida en la versión 0.8.9."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "unclecode",
          "product": "crawl4ai",
          "versions": [
            {
              "version": "< 0.8.9",
              "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:C/C:H/I:N/A:N",
          "baseScore": 8.6,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "CHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 4.0
      },
      {
        "source": "[email protected]",
        "type": "Primary",
        "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": "2026-06-26T15:01:20.774758Z",
          "id": "CVE-2026-53755",
          "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-918"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:kidocode:crawl4ai:*:*:*:*:*:*:*:*",
              "versionEndExcluding": "0.8.9",
              "matchCriteriaId": "788D4958-2D0D-43F1-BFC2-751DAC09C342"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/unclecode/crawl4ai/security/advisories/GHSA-6qhc-x826-342c",
      "source": "[email protected]",
      "tags": [
        "Third Party Advisory"
      ]
    }
  ]
}