{"id":"EUVD-2026-28815","revision":"dbe76d3d80dc4ea0b37aa6925dcb99bc","records":[{"revision":"dbe76d3d80dc4ea0b37aa6925dcb99bc","observedAt":"2026-10-28T05:09:58.937+00:00","statement":{"source":"euvd","id":"EUVD-2026-28815","aliases":["CVE-2026-41495","GHSA-pfm2-2mhg-8wpx"],"title":"n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to version 2.47.11, when n8n-mcp runs in HTTP transport mode, incoming requests to the POST /mcp endpoint had their req…","description":"n8n-MCP is an MCP server that provides AI assistants access to n8n node documentation, properties, and operations. Prior to version 2.47.11, when n8n-mcp runs in HTTP transport mode, incoming requests to the POST /mcp endpoint had their request metadata written to server logs regardless of the authentication outcome. In deployments where logs are collected, forwarded to external systems, or viewable outside the request trust boundary (shared log storage, SIEM pipelines, support/ops access), this can result in disclosure of: bearer tokens from the Authorization header, per-tenant API keys from the, x-n8n-key header in multi-tenant setups, JSON-RPC request payloads sent to the MCP endpoint. Access control itself was not bypassed — unauthenticated requests were correctly rejected with 401 Unauthorized — but sensitive values from those rejected requests could still be persisted in logs. This issue has been patched in version 2.47.11.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","score":5.3,"severity":null}],"references":["https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-pfm2-2mhg-8wpx","https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.47.11"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-28815","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"May 8, 2026, 6:58:24 PM","dateUpdated":"May 13, 2026, 5:47:45 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-28815","identifiers":["EUVD-2026-28815","CVE-2026-41495","GHSA-pfm2-2mhg-8wpx"]},"retained":false,"historicalAffected":[]}],"coverage":[]}