Insertion of Sensitive Information into Log File Affecting n8n-mcp package, versions <2.47.11
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- published28 Apr 2026
- disclosed23 Apr 2026
- creditS4nso
Introduced: 23 Apr 2026
NewCVE-2026-41495 (opens in a new tab)How to fix?
Upgrade n8n-mcp to version 2.47.11 or higher.
Overview
n8n-mcp is an Integration between n8n workflow automation and Model Context Protocol (MCP)
Affected versions of this package are vulnerable to Insertion of Sensitive Information into Log File in the POST /mcp endpoint. An attacker can cause sensitive information such as bearer tokens, API keys, and request payloads to be written to server logs by sending unauthorized requests.
Note: This is only exploitable if the application is running in HTTP transport mode and logs are accessible outside the trusted boundary.
Workaround
This vulnerability can be mitigated by restricting network access to the HTTP port so only trusted clients can reach the endpoint, or by switching to stdio transport mode.