Crawl4AI – Server-Side Request Forgery via Direct Crawl Endpoints_CVE-2026-56266

{
    "lastseen": "",
    "description": "Crawl4AI before 0.8.7 contains a server-side request forgery vulnerability in the /crawl, /crawl/stream, /md, and /llm endpoints that fetch arbitrary user-supplied URLs without validation. Unauthenticated attackers can bypass the internal-address blocklist using IPv6-mapped IPv4 addresses to reach internal services and cloud metadata endpoints.",
    "published": "2026-06-22T21:04:44.755Z",
    "modified": "2026-06-22T21:04:44.755Z",
    "type": "cve",
    "title": "Crawl4AI - Server-Side Request Forgery via Direct Crawl Endpoints",
    "source": "VulnCheck",
    "references": "https://github.com/unclecode/crawl4ai/security/advisories/GHSA-365w-hqf6-vxfg\nhttps://github.com/unclecode/crawl4ai\nhttps://www.vulncheck.com/advisories/crawl4ai-server-side-request-forgery-via-direct-crawl-endpoints",
    "id": "CVE-2026-56266",
    "bulletinFamily": "",
    "cwe": [
        "CWE-918"
    ],
    "cvelist": null,
    "sourceData": "Crawl4AI Crawl4AI 0",
    "sourceHref": "",
    "cvss": {
        "score": 9.2,
        "severity": "CRITICAL",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Crawl4AI",
    "version": "0.8.7",
    "vendor": "unclecode",
    "ai_description": "Server-side request forgery vulnerability in Crawl4AI before 0.8.7",
    "ai_severity": "Critical",
    "ai_vendor": "unclecode",
    "ai_product": "Crawl4AI",
    "ai_version": "<0.8.7",
    "ai_score": 9.2
}