Crawl4AI: SSRF via proxy settings in the Docker server bypasses the crawl-URL SSRF check_CVE-2026-53755

{
    "lastseen": "",
    "description": "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.",
    "published": "2026-06-23T18:15:31.586Z",
    "modified": "2026-06-23T18:15:31.586Z",
    "type": "cve",
    "title": "Crawl4AI: SSRF via proxy settings in the Docker server bypasses the crawl-URL SSRF check",
    "source": "GitHub_M",
    "references": "https://github.com/unclecode/crawl4ai/security/advisories/GHSA-6qhc-x826-342c",
    "id": "CVE-2026-53755",
    "bulletinFamily": "",
    "cwe": [
        "CWE-918"
    ],
    "cvelist": null,
    "sourceData": "unclecode crawl4ai < 0.8.9",
    "sourceHref": "",
    "cvss": {
        "score": 8.6,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
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            "userInteraction": "",
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            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "crawl4ai",
    "version": "< 0.8.9",
    "vendor": "unclecode",
    "ai_description": "SSRF via proxy settings in the Docker server bypasses the crawl-URL SSRF check",
    "ai_severity": "High",
    "ai_vendor": "unclecode",
    "ai_product": "Crawl4AI",
    "ai_version": "< 0.8.9",
    "ai_score": 8.6
}