CVE-2026-21877

{"id": "CVE-2026-21877", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-21877", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-01-08T18:59:03.985457Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 9.9, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 3.1}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "n8n-io", "product": "n8n", "versions": [{"status": "affected", "version": "< 1.121.3"}]}]}], "published": "2026-01-08T01:15:55.697", "references": [{"url": "https://github.com/n8n-io/n8n/commit/f4b009d00d1f4ba9359b8e8f1c071e3d910a55f6", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/n8n-io/n8n/security/advisories/GHSA-v364-rw7m-3263", "tags": ["Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-94"}, {"lang": "en", "value": "CWE-434"}]}], "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."}], "lastModified": "2026-06-17T10:19:04.527", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "ECD7E4E7-DB69-4A3C-B8AE-655D0081624D", "versionEndExcluding": "1.121.3", "versionStartIncluding": "0.123.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}