Detections
Analytics

SCA: security update for n8n-mcp (GHSA-pfm2-2mhg-8wpx)

medium Tenable Cloud Security Plugin ID 440775

Description

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

 - n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and
 operations. Prior to version 2.47.11, when n8n-mcp runs in HTTP transport mode, incoming requests to the
 POST /mcp endpoint had their request metadata written to server logs regardless of the authentication
 outcome. In deployments where logs are collected, forwarded to external systems, or viewable outside the
 request trust boundary (shared log storage, SIEM pipelines, support/ops access), this can result in
 disclosure of: bearer tokens from the Authorization header, per-tenant API keys from the, x-n8n-key header
 in multi-tenant setups, JSON-RPC request payloads sent to the MCP endpoint. Access control itself was not
 bypassed — unauthenticated requests were correctly rejected with 401 Unauthorized — but sensitive values
 from those rejected requests could still be persisted in logs. This issue has been patched in version
 2.47.11. (CVE-2026-41495)

Solution

Update the n8n-mcp library and its related packages to version 2.47.11 or later.

See Also

https://github.com/advisories/GHSA-pfm2-2mhg-8wpx

Plugin Details

Severity: Medium

ID: 440775

Version: Revision 1.5

Type: Local

Family: SCA Checks

Published: 4/23/2026

Updated: 7/2/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2026-41495

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/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: 4/23/2026

Vulnerability Publication Date: 4/23/2026

Reference Information

CVE: CVE-2026-41495

cwe: CWE-532