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CVE-2026-56356

Estado: AnalizadaMedia (5.1)—

n8n contains a stored cross-site scripting vulnerability in the Chat Trigger node's Custom CSS field due to a misconfiguration of the sanitize-html library. Affected releases are those before 1.123.27, the 2.0.0 through 2.13.2 line, and 2.14.0 (fixed in 1.123.27, 2.13.3, and 2.14.1). An authenticated user with permission to create or modify workflows can inject JavaScript that bypasses sanitization, resulting in stored XSS against any user who visits the public chat page.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

N8N — N8N

CWE

Referencias

JSON original (NVD)

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          "version": "2.0.3",
          "timestamp": "2026-07-01T13:24:24.754142Z"
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          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
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  "published": "2026-06-30T23:17:30.997",
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    },
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      "url": "https://www.vulncheck.com/advisories/n8n-stored-cross-site-scripting-in-chat-trigger-node-custom-css-field",
      "tags": [
        "Third Party Advisory"
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      "source": "disclosure@vulncheck.com"
    }
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "description": [
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          "value": "CWE-79"
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      "lang": "en",
      "value": "n8n contains a stored cross-site scripting vulnerability in the Chat Trigger node's Custom CSS field due to a misconfiguration of the sanitize-html library. Affected releases are those before 1.123.27, the 2.0.0 through 2.13.2 line, and 2.14.0 (fixed in 1.123.27, 2.13.3, and 2.14.1). An authenticated user with permission to create or modify workflows can inject JavaScript that bypasses sanitization, resulting in stored XSS against any user who visits the public chat page."
    }
  ],
  "lastModified": "2026-07-02T19:38:43.680",
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