CVE-2026-55608

n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.57.4, multi-tenant HTTP mode with ENABLE_MULTI_TENANT=true could allow an authenticated tenant to access default-scope workflow_versions backups instead of being confined to the tenant scope, exposing or deleting workflow-version backups from prior single-tenant deployments or migrations. This issue is fixed in version 2.57.4.

CVSS v3 4.2 MEDIUM

4.2^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.6 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/czlonkowski/n8n-mcp/commit/1f42899749ed0c584fb6b4fd63d75233c3edee59	Patch
https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.57.4	Release Notes
https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-2cf7-hpwf-47h9	Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:n8n-mcp:n8n-mcp:*:*:*:*:*:*:*:*

History

24 Oct 2026, 21:10

Type	Values Removed	Values Added
Summary		(es) n8n-MCP es un servidor MCP que proporciona a los asistentes de IA acceso a la documentación, propiedades y operaciones de los nodos n8n. Antes de la versión 2.57.4, el modo HTTP multi-inquilino con ENABLE_MULTI_TENANT=true podría permitir a un inquilino autenticado acceder a copias de seguridad de workflow_versions de alcance predeterminado en lugar de estar confinado al alcance del inquilino, exponiendo o eliminando copias de seguridad de versiones de flujo de trabajo de implementaciones o migraciones anteriores de un solo inquilino. Este problema está solucionado en la versión 2.57.4.

Information

Published : 2026-07-15 21:16

Updated : 2026-10-24 21:10

NVD link : CVE-2026-55608

Mitre link : CVE-2026-55608

CVE.ORG link : CVE-2026-55608

JSON object : View

Products Affected

n8n-mcp

n8n-mcp

CWE

CWE-200

Exposure of Sensitive Information to an Unauthorized Actor

CWE-863

Incorrect Authorization

{"id": "CVE-2026-55608", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-55608", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-17T12:32:17.752098Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.2, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "impactScore": 2.5, "exploitabilityScore": 1.6}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "impactScore": 2.5, "exploitabilityScore": 2.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "czlonkowski", "product": "n8n-mcp", "versions": [{"status": "affected", "version": "< 2.57.4"}]}]}], "published": "2026-07-15T21:16:55.307", "references": [{"url": "https://github.com/czlonkowski/n8n-mcp/commit/1f42899749ed0c584fb6b4fd63d75233c3edee59", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.57.4", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-2cf7-hpwf-47h9", "tags": ["Mitigation", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-200"}, {"lang": "en", "value": "CWE-863"}]}], "descriptions": [{"lang": "en", "value": "n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.57.4, multi-tenant HTTP mode with ENABLE_MULTI_TENANT=true could allow an authenticated tenant to access default-scope workflow_versions backups instead of being confined to the tenant scope, exposing or deleting workflow-version backups from prior single-tenant deployments or migrations. This issue is fixed in version 2.57.4."}, {"lang": "es", "value": "n8n-MCP es un servidor MCP que proporciona a los asistentes de IA acceso a la documentaci\u00f3n, propiedades y operaciones de los nodos n8n. Antes de la versi\u00f3n 2.57.4, el modo HTTP multi-inquilino con ENABLE_MULTI_TENANT=true podr\u00eda permitir a un inquilino autenticado acceder a copias de seguridad de workflow_versions de alcance predeterminado en lugar de estar confinado al alcance del inquilino, exponiendo o eliminando copias de seguridad de versiones de flujo de trabajo de implementaciones o migraciones anteriores de un solo inquilino. Este problema est\u00e1 solucionado en la versi\u00f3n 2.57.4."}], "lastModified": "2026-10-24T21:10:00.130", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:n8n-mcp:n8n-mcp:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D8421EBD-1A54-4D99-B9E3-46176539C254", "versionEndExcluding": "2.57.4"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}