CVE-2026-45582
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
n8n-mcpnpm | < 2.51.3 | 2.51.3 |
Affected products
2< 2.51.3+ 1 more
- (no CPE)range: < 2.51.3
- cpe:2.3:a:n8n-mcp:n8n-mcp:*:*:*:*:*:*:*:*range: <2.51.3
Patches
Vulnerability mechanics
References
6- github.com/czlonkowski/n8n-mcp/commit/6cf6fef653fcd6d598f2f356aac4754931c7329fnvdPatchWEB
- github.com/czlonkowski/n8n-mcp/pull/782nvdIssue TrackingPatchWEB
- github.com/advisories/GHSA-f3rg-xqjj-cj9wghsaADVISORY
- github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-f3rg-xqjj-cj9wnvdMitigationVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-45582ghsaADVISORY
- github.com/czlonkowski/n8n-mcp/releases/tag/v2.51.3nvdProductRelease NotesWEB
News mentions
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