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CVE-2026-45582

n8n-MCP: Workflow telemetry sanitizer could retain partial values from URL-shaped node parameters

Published: May 29, 2026Updated: Jul 21, 2026 Sources: CVE List NVDCWE-201
6.5MEDIUM
NVD MITRE
EPSS Score
0.3%
Top 82.1%
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. Prior to 2.51.3, the workflow telemetry sanitizer could retain partial fragments of URL-shaped node parameters before sending workflow data to the project's anonymous telemetry backend. Values placed in HTTP-Request-style node parameters — such as customer or tenant identifiers, short secrets embedded in query strings, and signed request parameters — could therefore appear in stored telemetry, contrary to the collection boundary documented in PRIVACY.md. This vulnerability is fixed in 2.51.3.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-201

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

References

https://github.com/czlonkowski/n8n-mcp/commit/6cf6fef653fcd6d598f2f356aac4754931c7329f
github.com
https://github.com/czlonkowski/n8n-mcp/pull/782
github.com
https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.51.3
github.com
and 1 more references View all →

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