by Kastro
Paper/Archive/CVE-2026-44694

CVE-2026-44694

czlonkowski n8n-mcp — n8n-MCP: Authenticated SSRF in n8n-mcp webhook and API client paths

EPSS 0.2%CVSS 9.1
critical.is priorityof 100
30
CVSS 9.1 (NVD)9.1 / 10 × 3027.3Not in CISA KEV+300.0EPSS percentile 14.5.145 × 202.9No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
n8n-mcp>= 2.18.7, < 2.50.2–CNA

Scores by source

NVD9.1CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L
GitHub_M (CNA)7.2CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:L/VA:L/SC:H/SI:L/SA:L
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refgithub.com/czlonkowski/n8n-mcp/security/advisories/GHSA-cmrh-wvq6-wm9rrefgithub.com/czlonkowski/n8n-mcp/commit/bcaba839409d470abeb4a6ad9b361b553a1098ebrefgithub.com/czlonkowski/n8n-mcp/releases/tag/v2.50.2