{"action":"Upgrade n8n-mcp to 2.47.4 or later.","affected":[{"fixed":"2.47.4","introduced":"0"}],"component":"n8n-mcp","cve_ids":["CVE-2026-39974"],"ecosystem":"npm","epss":0.00316,"exploited":false,"fixed_versions":["2.47.4"],"ghsa_id":"GHSA-4ggg-h7ph-26qr","id":"tcs_01M5KF0D1DJE8SCYRJZNREJXGD","modified_at":"2026-04-09T19:16:17.275218Z","published_at":"2026-04-08T19:53:48Z","references":["https://osv.dev/vulnerability/GHSA-4ggg-h7ph-26qr","https://github.com/czlonkowski/n8n-mcp/security/advisories/GHSA-4ggg-h7ph-26qr","https://nvd.nist.gov/vuln/detail/CVE-2026-39974","https://github.com/czlonkowski/n8n-mcp/commit/d9d847f230923d96e0857ccecf3a4dedcc9b0096","https://github.com/czlonkowski/n8n-mcp","https://github.com/czlonkowski/n8n-mcp/releases/tag/v2.47.4"],"severity":{"label":"high","score":8.5},"sources":[{"source":"osv","source_id":"GHSA-4ggg-h7ph-26qr","url":"https://osv.dev/vulnerability/GHSA-4ggg-h7ph-26qr"}],"summary":"n8n-mcp has authenticated SSRF via instance-URL header in multi-tenant HTTP mode"}