{
    "id": "CVE-2026-58057",
    "published": "2026-06-28 02:16:32",
    "last_modified": "2026-07-06 14:54:48",
    "cvss_score": "5.0",
    "cvss_severity": "MEDIUM",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L",
    "cwe": "CWE-178",
    "description": "Flowise before 3.1.3 validates Custom MCP stdio environment variables against a denylist using a case-sensitive comparison, so on Windows, where environment names are case-insensitive, supplying 'node_options' bypasses the NODE_OPTIONS denylist entry. An authenticated user who can configure a Custom MCP node can thereby inject NODE_OPTIONS --require and execute arbitrary code in the Flowise server context.",
    "epss_score": "0.01556",
    "epss_percentile": "0.74455",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-10-09 18:17:57",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "flowiseai",
            "product": "flowise"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "52623",
            "title": "Flowise  3.1.3 - arbitrary code execution",
            "date": "2026-07-07",
            "url": "https://www.exploit-db.com/exploits/52623"
        }
    ],
    "refs_list": [
        "https://github.com/FlowiseAI/Flowise/pull/6471",
        "https://github.com/bikini/exploitarium/tree/main/flowise-mcp-env-case-bypass-poc",
        "https://www.vulncheck.com/advisories/flowise-custom-mcp-environment-variable-denylist-bypass-via-case-sensitivity"
    ]
}