{"id":"CVE-2026-72749","aliases":["GHSA-xwx6-jjhv-84p8"],"url":"https://o3.security/vulnerability/CVE-2026-72749","summary":"n8n before 1.123.67 Prototype Pollution via Edit Fields","details":"## Impact\n\nThe Edit Fields (Set) node assigned output fields through a dot-notation path setter without restricting the field name, so an authenticated user could name a field after an inherited built-in method path and corrupt a shared global in the main Node.js process. Because that global was used on the request-authentication path, the instance then failed every authenticated request, causing a instance-wide denial of service for all users until the process was restarted.\n\n## Patches\n\nThe issue has been fixed in n8n versions 1.123.67, 2.31.5, and 2.32.1. Users should upgrade to one of these versions or later to remediate the vulnerability.\n\n## Workarounds\n\nIf upgrading is not immediately possible, administrators should consider the following temporary mitigations:\n- Restrict n8n instance access to fully trusted users only.\n- Disable or restrict workflow creation and execution permissions for untrusted users.\n- Monitor for unexpected process-wide HTTP 500 errors and restart the process promptly if they occur.\n\nThese workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.","published":"2026-08-11T12:17:02.774Z","modified":"2026-10-21T02:31:10.124246426Z","cvss":null,"epss":{"score":0.00313,"percentile":0.24131,"asOf":"2026-09-15"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"n8n","fixedVersion":"1.123.67"},{"ecosystem":"npm","name":"n8n","fixedVersion":"2.32.1"},{"ecosystem":"npm","name":"n8n","fixedVersion":"2.31.5"}],"fix":{"url":"https://github.com/n8n-io/n8n/commit/f69dfc6dd2178a14ea1624d2e1d403c2e755042f","label":"n8n-io/n8n@f69dfc6"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72749.json"},{"type":"ADVISORY","url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-xwx6-jjhv-84p8"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72749"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/n8n-before-prototype-pollution-via-edit-fields"},{"type":"WEB","url":"https://github.com/n8n-io/n8n/commit/f69dfc6dd2178a14ea1624d2e1d403c2e755042f"},{"type":"PACKAGE","url":"https://github.com/n8n-io/n8n"},{"type":"WEB","url":"https://github.com/n8n-io/n8n/releases/tag/n8n@1.123.67"},{"type":"WEB","url":"https://github.com/n8n-io/n8n/releases/tag/n8n@2.31.5"},{"type":"WEB","url":"https://github.com/n8n-io/n8n/releases/tag/n8n@2.32.1"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-21T02:31:10.124246426Z"}}