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CVE-2026-44694— n8n-MCP: Authenticated SSRF in n8n-mcp webhook and API client paths

Quick assessment

Affected
czlonkowski n8n-mcp
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

n8n-MCP是Romuald Członkowski个人开发者的一个连接AI助手与自动化工作流平台的模型上下文协议服务器。 n8n-MCP 2.18.7版本至2.50.2之前版本存在安全漏洞，该漏洞源于经过身份验证的服务端请求伪造，可能影响webhook触发工具、n8n API客户端和通过x-n8n-url标头提供的URL。

AI Predicted 8.1 Difficulty: Easy EPSS 0.31% · P22

Affected Version Matrix 1

VendorProduct Version RangeStatus
czlonkowski n8n-mcp >= 2.18.7, < 2.50.2 affected
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I. Basic Information for CVE-2026-44694

Vulnerability Information
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Vulnerability Title
n8n-MCP: Authenticated SSRF in n8n-mcp webhook and API client paths
Source: CVE Program / CVE List V5
Vulnerability Description
n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. From version 2.18.7 to before version 2.50.2, there is an authenticated server-side request forgery vulnerability affecting the webhook trigger tools, the n8n API client (N8N_API_URL), and per-request URLs supplied via the x-n8n-url header in multi-tenant HTTP mode. This issue has been patched in version 2.50.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:L/VA:L/SC:H/SI:L/SA:L
Source: CVE Program / CVE List V5
Vulnerability Type
检查时间与使用时间(TOCTOU)的竞争条件
Source: CVE Program / CVE List V5
Vulnerability Title
n8n-MCP 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
n8n-MCP是Romuald Członkowski个人开发者的一个连接AI助手与自动化工作流平台的模型上下文协议服务器。 n8n-MCP 2.18.7版本至2.50.2之前版本存在安全漏洞，该漏洞源于经过身份验证的服务端请求伪造，可能影响webhook触发工具、n8n API客户端和通过x-n8n-url标头提供的URL。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
czlonkowski n8n-mcp >= 2.18.7, < 2.50.2 -

II. Public POCs for CVE-2026-44694

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
default-local-qwen3.6 · 11777 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-44694

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Vendor Advisories for CVE-2026-44694 (1)

Other References for CVE-2026-44694 (1)

Same Patch Batch · czlonkowski · 2026-05-08 · 3 CVEs total

CVE-2026-41495 5.3 MEDIUM n8n-MCP Logs Sensitive Request Data on Unauthorized /mcp Requests
CVE-2026-42282 4.3 MEDIUM n8n-MCP: Sensitive MCP tool-call arguments logged on authenticated requests in HTTP mode

IV. Related Vulnerabilities

Same product: n8n-mcp
Same vendor: czlonkowski
Same weakness: CWE-367

V. Comments for CVE-2026-44694

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