TypeBot: Unauthenticated SSRF via isolated-vm fetch in preview chat endpoint bypasses SSRF controls_CVE-2026-33712

{
    "lastseen": "",
    "description": "Typebot is a chatbot builder tool. In versions 3.15.2 and prior, the preview chat endpoint (POST /api/v1/typebots/{typebotId}/preview/startChat) allows unauthenticated users to achieve Server-Side Request Forgery (SSRF) by supplying a custom typebot definition with server-side code blocks. The fetch function exposed inside the isolated-vm sandbox calls Node.js native fetch without the SSRF validation (validateHttpReqUrl) that protects the HTTP Request block. This bypasses all SSRF mitigations added after GHSA-8gq9-rw7v-3jpr. Exploitation of this unauthenticated SSRF vulnerability can lead to cloud credential theft, internal network access and data exfiltration for any self-hosted Typebot deployments and hosted services. This issue has been fixed in version 3.16.0.",
    "published": "2026-05-22T16:50:04.569Z",
    "modified": "2026-05-22T17:19:14.917Z",
    "type": "cve",
    "title": "TypeBot: Unauthenticated SSRF via isolated-vm fetch in preview chat endpoint bypasses SSRF controls",
    "source": "GitHub_M",
    "references": "https://github.com/baptisteArno/typebot.io/security/advisories/GHSA-vc2q-r6rq-ggj9\nhttps://github.com/baptisteArno/typebot.io/releases/tag/v3.16.0",
    "id": "CVE-2026-33712",
    "bulletinFamily": "",
    "cwe": [
        "CWE-862",
        "CWE-918"
    ],
    "cvelist": null,
    "sourceData": "baptisteArno typebot.io < 3.16.0",
    "sourceHref": "",
    "cvss": {
        "score": 10,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/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": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "typebot.io",
    "version": "< 3.16.0",
    "vendor": "baptisteArno",
    "ai_description": "Unauthenticated Server-Side Request Forgery (SSRF) vulnerability in Typebot's preview chat endpoint, allowing attackers to bypass SSRF controls and potentially lead to cloud credential theft, internal network access, and data exfiltration.",
    "ai_severity": "Critical",
    "ai_vendor": "baptisteArno",
    "ai_product": "Typebot",
    "ai_version": "3.15.2 and prior",
    "ai_score": 10
}