{"action":"Upgrade n8n to 2.25.7 or later.","affected":[{"fixed":"2.26.2","introduced":"2.26.0"},{"fixed":"2.25.7","introduced":"0"}],"component":"n8n","cve_ids":["CVE-2026-54309"],"ecosystem":"npm","epss":0.00546,"exploited":false,"fixed_versions":["2.26.2","2.25.7"],"ghsa_id":"GHSA-qrx8-25qr-5r7v","id":"tcs_01M5KG73G10GSM52N63G23GS8F","modified_at":"2026-07-20T13:45:32.235949356Z","published_at":"2026-06-16T23:32:31Z","references":["https://osv.dev/vulnerability/GHSA-qrx8-25qr-5r7v","https://github.com/n8n-io/n8n/security/advisories/GHSA-qrx8-25qr-5r7v","https://nvd.nist.gov/vuln/detail/CVE-2026-54309","https://github.com/n8n-io/n8n"],"severity":{"label":"critical","score":10},"sources":[{"source":"osv","source_id":"GHSA-qrx8-25qr-5r7v","url":"https://osv.dev/vulnerability/GHSA-qrx8-25qr-5r7v"}],"summary":"n8n: MCP Browser HTTP Transport Exposes Unauthenticated Browser-Control Sessions"}