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GHSA-G2PV-76HM-J4X9

Vulnerability from github – Published: 2026-07-01 00:34 – Updated: 2026-07-01 00:34
VLAI
Details

Crawl4AI before 0.8.7 contains an arbitrary JavaScript execution vulnerability in the Docker API server's /execute_js endpoint, which accepts and executes arbitrary user-supplied JavaScript in the server's browser context with --disable-web-security enabled. An attacker can execute arbitrary JavaScript and, combined with the browser's relaxed security settings, perform server-side request forgery against internal services.

Severity
8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
9.2 (Critical)
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
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{
  "affected": [],
  "aliases": [
    "CVE-2026-56264"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-94"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-30T23:17:29Z",
    "severity": "CRITICAL"
  },
  "details": "Crawl4AI before 0.8.7 contains an arbitrary JavaScript execution vulnerability in the Docker API server\u0027s /execute_js endpoint, which accepts and executes arbitrary user-supplied JavaScript in the server\u0027s browser context with --disable-web-security enabled. An attacker can execute arbitrary JavaScript and, combined with the browser\u0027s relaxed security settings, perform server-side request forgery against internal services.",
  "id": "GHSA-g2pv-76hm-j4x9",
  "modified": "2026-07-01T00:34:13Z",
  "published": "2026-07-01T00:34:12Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/unclecode/crawl4ai/security/advisories/GHSA-365w-hqf6-vxfg"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56264"
    },
    {
      "type": "WEB",
      "url": "https://github.com/unclecode/crawl4ai"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/crawl4ai-arbitrary-javascript-execution-via-execute-js-endpoint"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}



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