CVE-2026-21858

{"id": "CVE-2026-21858", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-21858", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-01-08T19:09:29.699244Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 10.0, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.8, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "n8n-io", "product": "n8n", "versions": [{"status": "affected", "version": ">= 1.65.0, < 1.121.0"}]}]}], "published": "2026-01-08T00:15:59.990", "references": [{"url": "https://github.com/n8n-io/n8n/security/advisories/GHSA-v4pr-fm98-w9pg", "tags": ["Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "https://www.cyera.com/research-labs/ni8mare-unauthenticated-remote-code-execution-in-n8n-cve-2026-21858", "tags": ["Exploit", "Third Party Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-20"}]}], "descriptions": [{"lang": "en", "value": "n8n is an open source workflow automation platform. Versions starting with 1.65.0 and below 1.121.0 enable an attacker to access files on the underlying server through execution of certain form-based workflows. A vulnerable workflow could grant access to an unauthenticated remote attacker, resulting in exposure of sensitive information stored on the system and may enable further compromise depending on deployment configuration and workflow usage. This issue is fixed in version 1.121.0."}, {"lang": "es", "value": "n8n es una plataforma de automatizaci\u00f3n de flujos de trabajo de c\u00f3digo abierto. Las versiones a partir de la 1.65.0 y anteriores a la 1.121.0 permiten a un atacante acceder a archivos en el servidor subyacente mediante la ejecuci\u00f3n de ciertos flujos de trabajo basados en formularios. Un flujo de trabajo vulnerable podr\u00eda conceder acceso a un atacante remoto no autenticado, lo que resultar\u00eda en la exposici\u00f3n de informaci\u00f3n sensible almacenada en el sistema y podr\u00eda permitir un mayor compromiso dependiendo de la configuraci\u00f3n de despliegue y el uso del flujo de trabajo. Este problema est\u00e1 solucionado en la versi\u00f3n 1.121.0."}], "lastModified": "2026-06-17T10:19:02.517", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "A90AFDBB-31A3-41C0-8E53-8D10D9FB47C3", "versionEndExcluding": "1.121.0", "versionStartIncluding": "1.65.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}