CVE-2026-41495 — n8n-MCP is an MCP server that provides AI assistants access
CVE-2026-41495 — 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 regard
What This Means For You
- If your environment is affected by CWE-532, review your exposure and prioritize patching based on your environment. Monitor vendor advisories for CVE-2026-41495 updates and patches.
Related ATT&CK Techniques
🛡️ Detection Rules
3 rules · 6 SIEM formats3 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
CVE-2026-41495 - n8n-MCP Unauthenticated POST to /mcp Endpoint
title: CVE-2026-41495 - n8n-MCP Unauthenticated POST to /mcp Endpoint
id: scw-2026-05-08-ai-1
status: experimental
level: medium
description: |
Detects unauthenticated POST requests to the /mcp endpoint of n8n-MCP, which is indicative of the vulnerability described in CVE-2026-41495. This vulnerability logs sensitive information like bearer tokens and API keys from these requests, even though they are unauthorized.
author: SCW Feed Engine (AI-generated)
date: 2026-05-08
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-41495/
tags:
- attack.defense_evasion
- attack.t1537
logsource:
category: webserver
detection:
selection:
cs-method:
- 'POST'
cs-uri:
- '/mcp'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-41495 | vulnerability | CVE-2026-41495 |
| CWE-532 | weakness | CWE-532 |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 08, 2026 at 23:16 UTC |
This content was curated and summarized by Shimi's Cyber World for informational purposes. It is not copied or republished in full. All intellectual property rights remain with the original author and source.
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