{"cve":"CVE-2026-45582","nvd":{"published":"2026-05-29T14:16:30.563","modified":"2026-07-21T12:10:00.090","status":"Analyzed","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","score":6.5},"cwes":["CWE-201"],"references":["https://github.com/czlonkowski/n8n-mcp/commit/6cf6fef653fcd6d598f2f356aac4754931c7329f","https://github.com/czlonkowski/n8n-mcp/pull/782","https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.51.3","https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-f3rg-xqjj-cj9w"],"products":["n8n-mcp:n8n-mcp"],"source":"nvd","synced_at":"2026-10-19T22:37:48.043517290+00:00"},"epss":{"cve":"CVE-2026-45582","score":0.00262,"percentile":0.17992,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-f3rg-xqjj-cj9w","url":"https://osv.dev/vulnerability/GHSA-f3rg-xqjj-cj9w","summary":"n8n-MCP: Workflow telemetry sanitizer could retain partial values from URL-shaped node parameters","modified":"2026-06-09T10:45:15.572125876Z","packages":[{"ecosystem":"npm","name":"n8n-mcp","purl":"pkg:npm/n8n-mcp","ranges":["<2.51.3"],"fixed":["2.51.3"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}