CVE-2026-39974: n8n-MCP is a Model Context Protocol (MCP) server that provides AI assistants with comprehensive access to n8n

Q: How do I fix CVE-2026-39974?

n8n-mcp: upgrade to 2.47.4. Exact commands for each OS are on this page.

Q: Is CVE-2026-39974 being exploited?

CVE-2026-39974 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-39974 affect?

CVE-2026-39974 affects n8n-mcp. Severity is high (CVSS 8.5). n8n-MCP is a Model Context Protocol (MCP) server that provides AI assistants with comprehensive access to n8n node documentation, properties, and operations. Prior to 2.47.4, an authenticated Server-Side Request Forgery in n8n-mcp allows a

Routine

HIGH 8.5UPGRADE

CVE-2026-39974 is a high-severity flaw (CVSS 8.5) affecting n8n-mcp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

n8n-MCP is a Model Context Protocol (MCP) server that provides AI assistants with comprehensive access to n8n node documentation, properties, and operations. Prior to 2.47.4, an authenticated Server-Side Request Forgery in n8n-mcp allows a caller holding a valid AUTH_TOKEN to cause the server to issue HTTP requests to arbitrary URLs supplied through multi-tenant HTTP headers. Response bodies are reflected back through JSON-RPC, so an attacker can

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 76%)
CISA exploited list	No
Weakness	CWE-918
Published	2026-04-09
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: n8n-mcp

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-09 17:16 UTCPublished CVE record published
2026-10-26 21:10 UTCUpdated Record last modified

n8n-mcp n8n-mcp UPGRADE

Affected: < 2.47.4

Fixed in: 2.47.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy n8n-mcp || rpm -q n8n-mcp || n8n-mcp --version

2. UPGRADE to 2.47.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade n8n-mcp

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade n8n-mcp

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-39974?

n8n-mcp: upgrade to 2.47.4. Exact commands for each OS are on this page.

Is CVE-2026-39974 being exploited?

CVE-2026-39974 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-39974 affect?

CVE-2026-39974 affects n8n-mcp. Severity is high (CVSS 8.5). n8n-MCP is a Model Context Protocol (MCP) server that provides AI assistants with comprehensive access to n8n node documentation, properties, and operations. Prior to 2.47.4, an authenticated Server-Side Request Forgery in n8n-mcp allows a

How urgent is CVE-2026-39974?

Priority 36/100. High severity

Related CVEs

CVE-2026-42449 HIGH 8.5 UPGRADE n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operati
CVE-2026-44694 CRITICAL 9.1 UPGRADE n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operati
CVE-2026-41495 MEDIUM 5.3 UPGRADE n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operati
CVE-2026-42282 MEDIUM 4.3 UPGRADE n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operati
CVE-2026-54052 CRITICAL 9.9 UPGRADE n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operati

References

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