CVE•Published 2026-07-15•Modified 2026-07-18•1 article on news•5 live references•NVD data

CVE-2026-54052N8n-mcp · N8n-mcp

Vulnerability data via NVD (ingested)

CVSS v3.1

9.9

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L

EPSS percentile

Exploit Prediction Scoring System · top 69% of all CVEs

Weaknesses (CWE)

CWE-639Authorization Bypass Through User-Controlled Key CWE-862Missing Authorization

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.

Timeline

Published 2026-07-15

Modified 2026-07-18

External references

NVD MITRE Exploit-DB GitHub PoC VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-54052

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"N8n-mcp N8n-mcp"

All exposed N8n-mcp N8n-mcp instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"N8n-mcp"

HTTP body or banner mentions "N8n-mcp" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-54052