Detections
Analytics

SCA: security update for n8n-mcp (GHSA-4ggg-h7ph-26qr)

high Tenable Self-Hosted Container Security Plugin ID 440090

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - 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 read the contents of any URL the server can reach — including cloud instance
 metadata endpoints (AWS IMDS, GCP, Azure, Alibaba, Oracle), internal network services, and any other host
 the server process has network access to. The primary at-risk deployments are multi-tenant HTTP
 installations where more than one operator can present a valid AUTH_TOKEN, or where a token is shared with
 less-trusted clients. Single-tenant stdio deployments and HTTP deployments without multi-tenant headers
 are not affected. This vulnerability is fixed in 2.47.4. (CVE-2026-39974)

Solution

Update the n8n-mcp library and its related packages to version 2.47.4 or later.

See Also

https://github.com/advisories/GHSA-4ggg-h7ph-26qr

Plugin Details

Severity: High

ID: 440090

Version: Revision 1.7

Type: Local

Family: SCA Checks

Published: 4/9/2026

Updated: 6/1/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3.9

Percentile: 52.47

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:P/A:N

CVSS Score Source: CVE-2026-39974

CVSS v3

Risk Factor: High

Base Score: 8.5

Temporal Score: 7.4

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 4/8/2026

Vulnerability Publication Date: 4/8/2026

Reference Information

CVE: CVE-2026-39974

cwe: CWE-918