n8n – Stored Cross-Site Scripting in Form Trigger Node_CVE-2026-56358

{
    "lastseen": "",
    "description": "n8n before 1.123.25 (1.x) and before 2.11.2 (2.x), with the fix also included in 2.12.0, contains a stored cross-site scripting vulnerability in the Form Trigger node's CSS sanitization that allows authenticated users to inject malicious scripts. Attackers with workflow creation permissions can inject XSS payloads that execute persistently for all form visitors, enabling form hijacking and phishing attacks.",
    "published": "2026-06-24T11:53:19.735Z",
    "modified": "2026-06-24T11:53:19.735Z",
    "type": "cve",
    "title": "n8n - Stored Cross-Site Scripting in Form Trigger Node",
    "source": "VulnCheck",
    "references": "https://github.com/n8n-io/n8n/security/advisories/GHSA-q4fm-pjq6-m63g\nhttps://www.vulncheck.com/advisories/n8n-stored-cross-site-scripting-in-form-trigger-node",
    "id": "CVE-2026-56358",
    "bulletinFamily": "",
    "cwe": [
        "CWE-79"
    ],
    "cvelist": null,
    "sourceData": "n8n n8n 0\nn8n n8n 2.0.0-rc.0\nn8n n8n 0\nn8n n8n 0",
    "sourceHref": "",
    "cvss": {
        "score": 5.1,
        "severity": "MEDIUM",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N",
        "version": "4.0"
    },
    "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": "n8n",
    "version": "0",
    "vendor": "n8n",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}