CVE-2026-33663

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Prior to versions 2.14.1, 2.13.3, and 1.123.27, an authenticated user with the `global:member` role could exploit chained authorization flaws in n8n's credential pipeline to steal plaintext secrets from generic HTTP credentials (`httpBasicAuth`, `httpHeaderAuth`, `httpQueryAuth`) belonging to other users on the same instance. The attack abuses a name-based credential resolution path that does not enforce ownership or project scope, combined with a bypass in the credentials permission checker that causes generic HTTP credential types to be skipped during pre-execution validation. Together, these flaws allow a member-role user to resolve another user's credential ID and execute a workflow that decrypts and uses that credential without authorization. Native integration credential types (e.g. `slackApi`, `openAiApi`, `postgres`) are not affected by this issue. This vulnerability affects Community Edition only. Enterprise Edition has additional permission gates on workflow creation and execution that independently block this attack chain. The issue has been fixed in n8n versions 1.123.27, 2.13.3, and 2.14.1. Users should upgrade to one of these versions or later to remediate the vulnerability. If upgrading is not immediately possible, administrators should consider the following temporary mitigations: Restrict instance access to fully trusted users only, and/or audit credentials stored on the instance and rotate any generic HTTP credentials (`httpBasicAuth`, `httpHeaderAuth`, `httpQueryAuth`) that may have been exposed. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures."}, {"lang": "es", "value": "n8n es una plataforma de automatizaci\u00f3n de flujos de trabajo de c\u00f3digo abierto. Antes de las versiones 2.14.1, 2.13.3 y 1.123.27, un usuario autenticado con el rol 'global:member' pod\u00eda explotar fallos encadenados de autorizaci\u00f3n en la cadena de credenciales de n8n para robar secretos en texto plano de credenciales HTTP gen\u00e9ricas ('httpBasicAuth', 'httpHeaderAuth', 'httpQueryAuth') pertenecientes a otros usuarios en la misma instancia. El ataque abusa de una ruta de resoluci\u00f3n de credenciales basada en nombres que no aplica la propiedad ni el alcance del proyecto, combinada con un bypass en el verificador de permisos de credenciales que hace que los tipos de credenciales HTTP gen\u00e9ricas se omitan durante la validaci\u00f3n previa a la ejecuci\u00f3n. Juntos, estos fallos permiten a un usuario con rol de miembro resolver el ID de credencial de otro usuario y ejecutar un flujo de trabajo que descifra y utiliza esa credencial sin autorizaci\u00f3n. Los tipos de credenciales de integraci\u00f3n nativa (por ejemplo, 'slackApi', 'openAiApi', 'postgres') no se ven afectados por este problema. Esta vulnerabilidad afecta solo a la Community Edition. La Enterprise Edition tiene puertas de permiso adicionales en la creaci\u00f3n y ejecuci\u00f3n de flujos de trabajo que bloquean independientemente esta cadena de ataque. El problema se ha solucionado en las versiones de n8n 1.123.27, 2.13.3 y 2.14.1. Los usuarios deben actualizar a una de estas versiones o posteriores para remediar la vulnerabilidad. Si la actualizaci\u00f3n no es posible de inmediato, los administradores deben considerar las siguientes mitigaciones temporales: Restringir el acceso a la instancia solo a usuarios de plena confianza, y/o auditar las credenciales almacenadas en la instancia y rotar cualquier credencial HTTP gen\u00e9rica ('httpBasicAuth', 'httpHeaderAuth', 'httpQueryAuth') que pueda haber sido expuesta. Estas soluciones provisionales no remedian completamente el riesgo y solo deben usarse como medidas de mitigaci\u00f3n a corto plazo."}], "id": "CVE-2026-33663", "lastModified": "2026-06-17T10:37:53.113", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.5, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-33663", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-25T17:51:35.840915Z", "version": "2.0.3"}}]}, "published": "2026-03-25T18:16:32.230", "references": [{"source": "security-advisories@github.com", "tags": ["Mitigation", "Vendor Advisory"], "url": "https://github.com/n8n-io/n8n/security/advisories/GHSA-m63j-689w-3j35"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-639"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.123.27)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.0.0-rc.0,2.13.3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.14.0"}}], "enrichment": {"confidence": 82.0, "confidence_source": "matching", "scores": [{"score": 82.0, "source": "matching"}]}, "original": {"product": "n8n", "source": "cna", "vendor": "n8n-io"}, "product": "n8n", "vendor": "n8n"}], "analysis": {"en": {"generated_at": "2026-03-31T18:51:16.305253+00:00", "value": {"mitigation_remediation": ["Upgrade n8n to version 1.123.27, 2.13.3, 2.14.1, or any later release to fully remediate the vulnerability.", "If an upgrade cannot be performed immediately, limit access to the instance to fully trusted users only to reduce the attack surface.", "Audit all stored credentials on the instance and rotate any generic HTTP credentials (httpBasicAuth, httpHeaderAuth, httpQueryAuth) that may have been exposed during the vulnerable period."], "summary": {"action": "Immediate Patch", "impact": "Plaintext credential theft"}, "threat_synthesis": {"affected_systems": "The vulnerability is limited to the Community Edition of n8n. All releases prior to version 2.14.1, 2.13.3, and 1.123.27 are affected, as indicated by the provided CPE strings. The Enterprise Edition contains additional permission gates on workflow creation and execution that independently block this attack chain and is therefore not impacted.", "description_and_impact": "n8n is an open\u2011source workflow automation platform that stores generic HTTP credentials\u2014such as httpBasicAuth, httpHeaderAuth, and httpQueryAuth\u2014encrypted on disk. Prior to the patch releases, an authenticated user possessing the global:member role could exploit two chained authorization gaps: a name\u2011based credential resolution path that ignores ownership or project boundaries and a bypass in the credential permission checker that skips generic HTTP credential types during pre\u2011execution validation. This chain allows the attacker to resolve the ID of another user\u2019s credential, decrypt it at runtime, and use the plaintext secret to access external services without proper authorization. The result is the disclosure of sensitive credentials belonging to other users on the same instance, which can lead to account takeover or data exfiltration. The flaw is classified as CWE\u2011639, unauthorized use of privileged credentials.", "risk_and_exploitability": "The flaw carries a CVSS score of 8.5, indicating high severity, but an EPSS score of less than 1% suggests a low likelihood of exploitation in the wild. It is not listed in the CISA Known Exploited Vulnerabilities catalog. Exploitation requires an authenticated member\u2011role user on the same instance, after which any other user\u2019s generic HTTP credentials can be retrieved. The attack surface is therefore confined to the preconditions of an authorized user; no external network vector is required. The potential impact is a confidentiality breach for all users on the affected instance."}}}}, "created": "2026-03-25T21:46:35.991508+00:00", "updated": "2026-03-31T20:09:13.349220+00:00", "vendors": ["n8n", "n8n$PRODUCT$n8n"]}