MCP Observatory
4m ago Tracked 26,550 Last 4m ago 24h 1,898
npm JavaScript analyzed 2.67.2

n8n-mcp

v2.67.2
npm

Integration between n8n workflow automation and Model Context Protocol (MCP)

maintainer
czlonkowski
license
MIT
first seen
2026-05-22
last seen
2026-08-01
releases · 30d
28
short id
risk 86/100 · heuristic grade
E critical
  • vulnerabilities attested + 50
  • capability exposure inferred + 35
  • inherited (deps) attested + 15
  • trust mitigators mixed − 14

attested inferred mixed

The A–E grade is our heuristic synthesis — a "review this" prompt, not a verdict. Each factor is tagged by what backs it: attested (a verifiable record), reported (a third party's claim), or inferred (our own heuristic, e.g. permissions). See methodology.

graded 17s ago · see ecosystem CVEs →

risk trajectory 1 movements
  • C · 51 → E · 86
capability exposure grade factor +35
Inferred surface — each links to servers holding it:
vulnerabilities 11 CVEs · grade factor +50
CRITICAL
n8n-MCP: Cross-tenant access to workflow version backups in multi-tenant HTTP deployments EPSS 0% CVE-2026-54052 CVSS 9.9 affects [{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.56.1"}]}] fixed in 2.56.1 GHSA GHSA GHSA
HIGH
n8n-MCP: Multi-tenant MCP requests fall back to process-level n8n credentials when tenant headers ar … EPSS 0% CVE-2026-45707 CVSS 8.1 affects [{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.51.2"}]}] fixed in 2.51.2 GHSA NVD GHSA GHSA
HIGH
n8n-mcp affected by path traversal, redirect-following SSRF, and telemetry payload exposure CVSS 8.3 affects [{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.50.1"}]}] fixed in 2.50.1 GHSA GHSA GHSA GHSA
HIGH
n8n-mcp webhook and API client paths has an authenticated SSRF EPSS 0% CVE-2026-44694 CVSS 8.0 affects [{"type":"SEMVER","events":[{"introduced":"2.18.7"},{"fixed":"2.50.2"}]}] fixed in 2.50.2 GHSA NVD GHSA GHSA
HIGH
n8n-mcp's IPv4-mapped IPv6 addresses bypass SSRF protection in validateUrlSync(), enabling full SSRF … EPSS 0% CVE-2026-42449 CVSS 8.5 affects [{"type":"SEMVER","events":[{"introduced":"2.47.4"},{"fixed":"2.47.14"}]}] fixed in 2.47.14 GHSA NVD GHSA GHSA
HIGH
n8n-mcp has unauthenticated session termination and information disclosure in HTTP transport CVSS 8.2 affects [{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.47.6"}]}] fixed in 2.47.6 GHSA GHSA GHSA GHSA
HIGH
n8n-mcp has authenticated SSRF via instance-URL header in multi-tenant HTTP mode EPSS 0% CVE-2026-39974 CVSS 8.5 affects [{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.47.4"}]}] fixed in 2.47.4 GHSA NVD GHSA GHSA
MEDIUM
n8n-MCP: Incorrect authorization can expose default-scope workflow version backups in multi-tenant H … EPSS 0% CVE-2026-55608 CVSS 4.2 affects [{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.57.4"}]}] fixed in 2.57.4 GHSA GHSA GHSA GHSA
MEDIUM
n8n-MCP: Workflow telemetry sanitizer could retain partial values from URL-shaped node parameters EPSS 0% CVE-2026-45582 CVSS 6.5 affects [{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.51.3"}]}] fixed in 2.51.3 GHSA NVD GHSA GHSA
MEDIUM
n8n-MCP: Sensitive MCP tool-call arguments logged on authenticated requests in HTTP mode EPSS 0% CVE-2026-42282 CVSS 4.3 affects [{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.47.13"}]}] fixed in 2.47.13 GHSA NVD GHSA GHSA
MEDIUM
n8n-MCP Logs Sensitive Request Data on Unauthorized /mcp Requests EPSS 0% CVE-2026-41495 CVSS 5.3 affects [{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.47.11"}]}] fixed in 2.47.11 GHSA NVD GHSA GHSA

inherited (deps) · grade factor +15

inherited via dependencies 3
HIGH
@modelcontextprotocol/sdk has cross-client data leak via shared server/transport instance reuse via @modelcontextprotocol/sdk · 1 hop CVE-2026-25536 fixed in 1.26.0
HIGH
Anthropic's MCP TypeScript SDK has a ReDoS vulnerability via @modelcontextprotocol/sdk · 1 hop CVE-2026-0621 fixed in 1.25.2
HIGH
Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default via @modelcontextprotocol/sdk · 1 hop CVE-2025-66414 fixed in 1.24.0
tool safety all quiet

No tool-safety findings — heuristic detectors run on the compute-risk cadence; a finding appears when a tool trips a rule.

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Heuristic, inferred signals — false positives (legitimately powerful tools, forks, language ports) are expected. Treat each as "review this", not a verdict. See the ecosystem-wide picture on the security hub, or the fleet security of czlonkowski.