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CVE-2026-103256

Estado: AplazadaAlta (7.1)—

n8n versions before 2.39.6 and 2.40.0 before 2.40.1 contain a credentials leak vulnerability in the Wekan and Baserow username-and-password credentials that sends unencrypted passwords to unvalidated hosts. Attackers with credential update permissions can modify the host field to receive account passwords at arbitrary hosts, bypassing domain validation controls.

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).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Atacante autenticado (PR:L) modifica campo host en credenciales Wekan/Baserow para interceptar contraseñas en texto plano (CWE-522), explotando servicio remoto sin validación de dominio. VC:H confirma exposición de credenciales.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Privileged Account ManagementNetwork SegmentationVulnerability ScanningUser Account ManagementThreat Intelligence ProgramMulti-factor Authentication

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

N8N — N8NAI

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2026-103256",
  "cveTags": [],
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        "ssvcData": {
          "id": "CVE-2026-103256",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
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              "automatable": "no"
            },
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              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2026-10-01T13:27:54.726455Z"
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    "cvssMetricV31": [
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          "integrityImpact": "LOW",
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          "Automatable": "NOT_DEFINED",
          "attackVector": "NETWORK",
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          "valueDensity": "NOT_DEFINED",
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          "vulnIntegrityImpact": "NONE",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
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          "vulnAvailabilityImpact": "NONE",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
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          "modifiedAttackRequirements": "NOT_DEFINED",
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          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
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      "affectedData": [
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          "product": "n8n",
          "versions": [
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              "version": "0",
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              "versionType": "semver"
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              "version": "2.40.0",
              "lessThan": "2.40.1",
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          "packageURL": "pkg:npm/n8n",
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  "published": "2026-10-01T11:17:19.913",
  "references": [
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      "url": "https://github.com/n8n-io/n8n/security/advisories/GHSA-gx6g-2hm7-c4xf",
      "source": "disclosure@vulncheck.com"
    },
    {
      "url": "https://www.vulncheck.com/advisories/n8n-before-2.39.6-and-2.40-x-before-2.40.1-credentials-leak-via-preauthentication-hook",
      "source": "disclosure@vulncheck.com"
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  "vulnStatus": "Deferred",
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      "description": [
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    }
  ],
  "lastModified": "2026-10-01T14:17:22.170",
  "sourceIdentifier": "disclosure@vulncheck.com"
}