https://db.gcve.eu/rss/recent/all/10 Most recent entries from all 2026-10-14T08:37:35.364850+00:00 Vulnerability-Lookup info@gcve.eu python-feedgen Contains only the most 10 recent entries. https://db.gcve.eu/vuln/brew-n8n-mcp-cve-2026-45582 BREW-n8n-mcp-CVE-2026-45582 — n8n-MCP: Workflow telemetry sanitizer could retain partial values from URL-shaped node parameters 2026-10-14T08:37:35.366986+00:00

Affected: Homebrew: n8n-mcp

## Summary

In affected versions of n8n-mcp, 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`.

## Impact

Operators with access to the project's telemetry backend could read partial fragments of workflow URL parameters that should not have been collected. The bug was scoped to URL-shaped fields in workflow *definitions*; credentials, OAuth tokens, and workflow *execution* data are not affected — credentials are removed by a separate code path, and long secrets and known-provider tokens are matched by dedicated patterns.

## Patches

Fixed in **n8n-mcp `2.51.3`**. Upgrading is the recommended remediation.

## Workarounds

For users who cannot upgrade immediately, disable anonymous telemetry by setting any of these environment variables to `true`:

- `N8N_MCP_TELEMETRY_DISABLED` - `TELEMETRY_DISABLED` - `DISABLE_TELEMETRY`

## Credit

Reported by @u-ktdi.

 https://db.gcve.eu/vuln/cve-2026-45582 CVE-2026-45582 — n8n-MCP: Workflow telemetry sanitizer could retain partial values from URL-shaped node parameters 2026-10-14T08:37:35.367085+00:00

Affected: czlonkowski n8n-mcp

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.