CVE-2026-45582 (GCVE-0-2026-45582)
Vulnerability from cvelistv5 – Published: 2026-05-29 13:37 – Updated: 2026-05-29 18:44
VLAI
EPSS
VEX
Title
n8n-MCP: Workflow telemetry sanitizer could retain partial values from URL-shaped node parameters
Summary
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.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-29 18:44 UTC
CWE
- CWE-201 - Insertion of Sensitive Information Into Sent Data
Assigner
GitHub_M
CNA
References
4 references
| URL | Tags |
|---|---|
| https://github.com/czlonkowski/n8n-mcp/security/a… | x_refsource_CONFIRM |
| https://github.com/czlonkowski/n8n-mcp/pull/782 | x_refsource_MISC |
| https://github.com/czlonkowski/n8n-mcp/commit/6cf… | x_refsource_MISC |
| https://github.com/czlonkowski/n8n-mcp/releases/t… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| czlonkowski | n8n-mcp |
Affected:
< 2.51.3
|
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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