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CVE-2026-56357

Estado: AnalizadaMedia (6.3)—

n8n before 1.123.15 and 2.5.0 contains a webhook forgery vulnerability in the GitHub Webhook Trigger node that fails to implement HMAC-SHA256 signature verification. Attackers who know the webhook URL can send unsigned POST requests to trigger workflows with arbitrary data, spoofing GitHub webhook events.

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)

Mostrar
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  "id": "CVE-2026-56357",
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          "version": "2.0.3",
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          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
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      "affectedData": [
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              "lessThan": "1.123.15",
              "versionType": "semver"
            },
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  "published": "2026-06-22T22:16:52.510",
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      "url": "https://github.com/n8n-io/n8n/security/advisories/GHSA-mqpr-49jj-32rc",
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    },
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      "url": "https://www.vulncheck.com/advisories/n8n-webhook-forgery-via-missing-hmac-sha256-signature-verification-in-github-webhook-trigger",
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  "weaknesses": [
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          "value": "CWE-290"
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      "lang": "en",
      "value": "n8n before 1.123.15 and 2.5.0 contains a webhook forgery vulnerability in the GitHub Webhook Trigger node that fails to implement HMAC-SHA256 signature verification. Attackers who know the webhook URL can send unsigned POST requests to trigger workflows with arbitrary data, spoofing GitHub webhook events."
    }
  ],
  "lastModified": "2026-06-24T16:47:01.937",
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