{"id":"CVE-2026-54301","aliases":["GHSA-v733-mwr6-fgcm"],"url":"https://o3.security/vulnerability/CVE-2026-54301","summary":"n8n: Same-Origin XSS in Respond to Webhook Node","details":"n8n is an open source workflow automation platform. Prior to 1.123.55, 2.25.7, and 2.26.2, an authenticated user with workflow edit access could configure a Respond to Webhook node to serve binary content with an attacker-controlled Content-Type. The binary response path bypassed the central Content-Security-Policy sandbox header, allowing a public webhook to execute JavaScript in the n8n origin when visited by an authenticated user, with access to that user's session. This vulnerability is fixed in 1.123.55, 2.25.7, and 2.26.2.","published":"2026-06-23T15:44:58.322Z","modified":"2026-08-07T11:31:33.158608630Z","cvss":null,"epss":{"score":0.00217,"percentile":0.12125,"asOf":"2026-08-10"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"n8n","fixedVersion":"1.123.55"},{"ecosystem":"npm","name":"n8n","fixedVersion":"2.26.2"},{"ecosystem":"npm","name":"n8n","fixedVersion":"2.25.7"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54301.json"},{"type":"ADVISORY","url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-v733-mwr6-fgcm"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54301"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T11:31:33.158608630Z"}}