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CVE-2026-56359

Estado: AnalizadaMedia (4.8)—

n8n before 2.8.0 contains a cross-site scripting vulnerability in the credential management flow where authenticated users can inject malicious JavaScript URLs into OAuth2 credential Authorization URL fields. Attackers can craft malicious credentials and trick victims into clicking the OAuth authorization button, executing arbitrary scripts in their browser session with the victim's privileges.

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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              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2026-07-09T13:35:54.521387Z"
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
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        "cvssData": {
          "Safety": "NOT_DEFINED",
          "version": "4.0",
          "Recovery": "NOT_DEFINED",
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          "Automatable": "NOT_DEFINED",
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "valueDensity": "NOT_DEFINED",
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          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
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              "version": "2.6.4",
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          ],
          "packageURL": "pkg:npm/n8n",
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  "published": "2026-07-08T14:17:16.620",
  "references": [
    {
      "url": "https://github.com/n8n-io/n8n/security/advisories/GHSA-364x-8g5j-x2pr",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ],
      "source": "disclosure@vulncheck.com"
    },
    {
      "url": "https://www.vulncheck.com/advisories/n8n-cross-site-scripting-in-credential-management-oauth2-authorization-url",
      "tags": [
        "Third Party Advisory"
      ],
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  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "source": "disclosure@vulncheck.com",
      "description": [
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          "lang": "en",
          "value": "CWE-79"
        }
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  ],
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      "lang": "en",
      "value": "n8n before 2.8.0 contains a cross-site scripting vulnerability in the credential management flow where authenticated users can inject malicious JavaScript URLs into OAuth2 credential Authorization URL fields. Attackers can craft malicious credentials and trick victims into clicking the OAuth authorization button, executing arbitrary scripts in their browser session with the victim's privileges."
    }
  ],
  "lastModified": "2026-07-09T15:16:38.060",
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    {
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          "negate": false,
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              "versionEndExcluding": "2.6.4"
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}