← Vulnerability feed

Vulnerability record · CVE-2026-44694 · published 8 May 2026

CVE-2026-44694: N8n-mcp toctou race condition vulnerability

N8n Mcp · N8n Mcp

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.

7.2 CVSS 4.0 High EPSS 0.31% · top 78.7% CWE-367 · TOCTOU race conditionCWE-918 · Server-side request forgery (SSRF)
7.2CVSS 4.0 base score
0.31%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References
17 Jun 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/czlonkowski/n8n-mcp/commit/bcaba839409d470abeb4a6ad9b361b553a1098eb Patch
https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.50.2 ProductRelease Notes
https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-cmrh-wvq6-wm9r MitigationVendor Advisory

Track CVE-2026-44694 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.9CVE-2026-54052N8n-mcp insecure direct object reference vulnerabilityn8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.56.1, in HTTP mode with…EPSS 0.39%8.5CVE-2026-42449N8n-mcp server-side request forgery (ssrf) vulnerabilityn8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. In versions 2.47.4 through 2.47.13…EPSS 0.33%8.5CVE-2026-39974N8n-mcp server-side request forgery (ssrf) vulnerabilityn8n-MCP is a Model Context Protocol (MCP) server that provides AI assistants with comprehensive access to n8n node documentation, properties, and ope…EPSS 0.43%8.1CVE-2026-45707N8n-mcp improper access control vulnerabilityn8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.51.2, when ENABLE_MULTI…EPSS 0.41%6.5CVE-2026-45582N8n-mcp vulnerabilityn8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.51.3, the workflow tele…EPSS 0.46%5.4CVE-2026-55608N8n-mcp information exposure vulnerabilityn8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to 2.57.4, multi-tenant HTTP…EPSS 0.28%5.3CVE-2026-41495N8n-mcp sensitive information in log file vulnerabilityn8n-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…EPSS 0.41%4.3CVE-2026-42282N8n-mcp sensitive information in log file vulnerabilityn8n-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…EPSS 0.43%

Source: NIST National Vulnerability Database (record CVE-2026-44694), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.