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CVE-2026-44694

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

Published: May 8, 2026Updated: May 14, 2026 Sources: CVE List NVDCWE-367
9.1CRITICAL
NVD MITRE
EPSS Score
0.2%
Top 85.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:CC:HI:LA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:LIntegrity
Low
A:LAvailability
Low
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Weaknesses

CWE-367CWE-918

Affected Products

n8n-mcp
oss-project
n8n-mcpMixed
AI / ML / ai-agent-tooling
czlonkowski
oss-project
n8n-mcpMixed
DevTools & CI / ci-cd

Exploitability

Official Patch Available
Workaround Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

3 techniques
Command and Control
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://github.com/czlonkowski/n8n-mcp/commit/bcaba839409d470abeb4a6ad9b361b553a1098eb
github.com
https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.50.2
github.com
https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-cmrh-wvq6-wm9r
github.com

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