CVE-2026-42282 — n8n-MCP is an MCP server that provides AI assistants access
CVE-2026-42282 — n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to version 2.47.13, when n8n-mcp runs in HTTP transport mode, authenticated MCP tools/call requests had their full arguments and JSON-RPC params written to server
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-2026-42282 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.
Sensitive Data in n8n-MCP Logs via Tool Arguments - CVE-2026-42282
title: Sensitive Data in n8n-MCP Logs via Tool Arguments - CVE-2026-42282
id: scw-2026-05-08-ai-1
status: experimental
level: medium
description: |
Detects requests to the n8n-MCP RPC endpoint that contain 'n8n_manage_credentials.data' in the query string. This indicates a potential attempt to log sensitive credential material as per CVE-2026-42282, where tool arguments, including credentials, were logged before redaction in versions prior to 2.47.13.
author: SCW Feed Engine (AI-generated)
date: 2026-05-08
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-42282/
tags:
- attack.collection
- attack.t1071.001
logsource:
category: webserver
detection:
selection:
cs-uri|contains:
- '/api/v1/rpc'
cs-uri-query|contains:
- 'n8n_manage_credentials.data'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-42282 | vulnerability | CVE-2026-42282 |
| 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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