FKIE_CVE-2026-21877

Vulnerability from fkie_nvd - Published: 2026-01-08 01:15 - Updated: 2026-01-20 15:08
Severity ?
9.9 (Critical) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Summary
n8n is an open source workflow automation platform. In versions 0.121.2 and below, an authenticated attacker may be able to execute malicious code using the n8n service. This could result in full compromise and can impact both self-hosted and n8n Cloud instances. This issue is fixed in version 1.121.3. Administrators can reduce exposure by disabling the Git node and limiting access for untrusted users, but upgrading to the latest version is recommended.
References
security-advisories@github.comhttps://github.com/n8n-io/n8n/commit/f4b009d00d1f4ba9359b8e8f1c071e3d910a55f6Patch
security-advisories@github.comhttps://github.com/n8n-io/n8n/security/advisories/GHSA-v364-rw7m-3263Vendor Advisory
Impacted products
Vendor Product Version
n8n n8n *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*",
              "matchCriteriaId": "ECD7E4E7-DB69-4A3C-B8AE-655D0081624D",
              "versionEndExcluding": "1.121.3",
              "versionStartIncluding": "0.123.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "n8n is an open source workflow automation platform. In versions 0.121.2 and below, an authenticated attacker may be able to execute malicious code using the n8n service. This could result in full compromise and can impact both self-hosted and n8n Cloud instances. This issue is fixed in version 1.121.3. Administrators can reduce exposure by disabling the Git node and limiting access for untrusted users, but upgrading to the latest version is recommended."
    },
    {
      "lang": "es",
      "value": "n8n es una plataforma de automatizaci\u00f3n de flujos de trabajo de c\u00f3digo abierto. En las versiones 0.121.2 e inferiores, un atacante autenticado podr\u00eda ejecutar c\u00f3digo malicioso utilizando el servicio n8n. Esto podr\u00eda resultar en un compromiso total y puede impactar tanto las instancias autoalojadas como las de n8n Cloud. Este problema est\u00e1 solucionado en la versi\u00f3n 1.121.3. Los administradores pueden reducir la exposici\u00f3n deshabilitando el nodo Git y limitando el acceso a usuarios no confiables, pero se recomienda actualizar a la \u00faltima versi\u00f3n."
    }
  ],
  "id": "CVE-2026-21877",
  "lastModified": "2026-01-20T15:08:24.850",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.9,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 6.0,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-01-08T01:15:55.697",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/n8n-io/n8n/commit/f4b009d00d1f4ba9359b8e8f1c071e3d910a55f6"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://github.com/n8n-io/n8n/security/advisories/GHSA-v364-rw7m-3263"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-94"
        },
        {
          "lang": "en",
          "value": "CWE-434"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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