n8n-MCP: Workflow telemetry sanitizer could retain partial values from URL-shaped node parameters_CVE-2026-45582

{
    "lastseen": "",
    "description": "n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.51.3, the workflow telemetry sanitizer could retain partial fragments of URL-shaped node parameters before sending workflow data to the project's anonymous telemetry backend. Values placed in HTTP-Request-style node parameters \u2014 such as customer or tenant identifiers, short secrets embedded in query strings, and signed request parameters \u2014 could therefore appear in stored telemetry, contrary to the collection boundary documented in PRIVACY.md. This vulnerability is fixed in 2.51.3.",
    "published": "2026-05-29T13:37:30.720Z",
    "modified": "2026-05-29T13:37:30.720Z",
    "type": "cve",
    "title": "n8n-MCP: Workflow telemetry sanitizer could retain partial values from URL-shaped node parameters",
    "source": "GitHub_M",
    "references": "https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-f3rg-xqjj-cj9w\nhttps://github.com/czlonkowski/n8n-mcp/pull/782\nhttps://github.com/czlonkowski/n8n-mcp/commit/6cf6fef653fcd6d598f2f356aac4754931c7329f\nhttps://github.com/czlonkowski/n8n-mcp/releases/tag/v2.51.3",
    "id": "CVE-2026-45582",
    "bulletinFamily": "",
    "cwe": [
        "CWE-201"
    ],
    "cvelist": null,
    "sourceData": "czlonkowski n8n-mcp < 2.51.3",
    "sourceHref": "",
    "cvss": {
        "score": 6.5,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/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": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
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            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "n8n-mcp",
    "version": "< 2.51.3",
    "vendor": "czlonkowski",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}