Flowise: Authenticated Host RCE via POST /api/v1/node-custom-function and NodeVM Sandbox Escape_CVE-2026-46442

{
    "lastseen": "",
    "description": "Flowise is a drag & drop user interface to build a customized large language model flow. Prior to version 3.1.2, POST /api/v1/node-custom-function lacks route-level authorization, allowing any authenticated user or API key to submit arbitrary JavaScript to the Custom JS Function node. When E2B_APIKEY is not configured \u2014 the common deployment case \u2014 Flowise executes this code inside a NodeVM sandbox. This sandbox can be escaped, allowing an attacker to reach the host process object and execute system commands via child_process. The result is authenticated remote code execution on the Flowise server host. This issue has been patched in version 3.1.2.",
    "published": "2026-06-08T15:30:48.999Z",
    "modified": "2026-06-08T15:30:48.999Z",
    "type": "cve",
    "title": "Flowise: Authenticated Host RCE via POST /api/v1/node-custom-function and NodeVM Sandbox Escape",
    "source": "GitHub_M",
    "references": "https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-9rvc-vf7m-pgm2\nhttps://github.com/FlowiseAI/Flowise/releases/tag/flowise%403.1.2",
    "id": "CVE-2026-46442",
    "bulletinFamily": "",
    "cwe": [
        "CWE-94"
    ],
    "cvelist": null,
    "sourceData": "FlowiseAI Flowise < 3.1.2",
    "sourceHref": "",
    "cvss": {
        "score": 9.4,
        "severity": "CRITICAL",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
        "version": "4.0"
    },
    "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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            "privilegesRequired": "",
            "userInteraction": "",
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            "confidentialityImpact": "",
            "integrityImpact": "",
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        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Flowise",
    "version": "< 3.1.2",
    "vendor": "FlowiseAI",
    "ai_description": "Authenticated remote code execution on the Flowise server host via NodeVM sandbox escape",
    "ai_severity": "Critical",
    "ai_vendor": "FlowiseAI",
    "ai_product": "Flowise",
    "ai_version": "< 3.1.2",
    "ai_score": 9.4
}