Is CVE-2026-54052 actively exploited?

No active exploitation of CVE-2026-54052 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-54052 be exploited remotely?

Yes. CVE-2026-54052 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-54052?

CVE-2026-54052 has a CVSS score of 9.9 (CRITICAL).

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CRITICAL

CVE-2026-54052

CWE-639Published: July 15, 2026· Updated: Jul 15, 2026

9.9

CVSS v3.1

Official Description

n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.56.1, in HTTP mode with multi-tenancy enabled through ENABLE_MULTI_TENANT=true, n8n-mcp's local workflow version history backups were not isolated per tenant, allowing an authenticated tenant to read workflow version snapshots belonging to other tenants and delete or destroy other tenants' stored backups, including full node definitions, credential references, and authorization headers. This issue is fixed in version 2.56.1.

NVD Source

Risk Analysis

This critical vulnerability in n8n-MCP allows an authenticated tenant to access and manipulate other tenants' workflow version history backups. The flaw is due to a lack of proper isolation in HTTP mode with multi-tenancy enabled, leading to a CVSS score of 9.9.

No public exploit is currently known for this remotely exploitable vulnerability.

Recommended Action

Upgrade n8n-MCP to version 2.56.1 or later to ensure proper tenant isolation for workflow backups. Verify multi-tenancy configurations are secure and prevent cross-tenant data access.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2026-54052 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), with a CVSS base score of 9.9.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.