{"id":"CVE-2026-59206","aliases":["GHSA-75qm-gp28-rcq9"],"url":"https://o3.security/vulnerability/CVE-2026-59206","summary":"n8n: Prototype Pollution via Workflow Credentials Leads to Unauthenticated User and Project Enumeration","details":"n8n is an open source workflow automation platform. Prior to 1.123.61, 2.27.4, and, 2.28.1, an authenticated user with the default workflow:create permission could pollute Object.prototype through a crafted workflow saved, updated, or imported via the workflow API, allowing unauthenticated requests to be treated as a privileged user and exposing user and project listing endpoints. This issue is fixed in versions 1.123.61, 2.27.4, and 2.28.1.","published":"2026-07-09T15:30:28.166Z","modified":"2026-08-12T03:51:19.798615950Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"n8n","fixedVersion":"1.123.61"},{"ecosystem":"npm","name":"n8n","fixedVersion":"2.28.1"},{"ecosystem":"npm","name":"n8n","fixedVersion":"2.27.4"}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/n8n-io/n8n/releases/tag/n8n%402.27.4"},{"type":"WEB","url":"https://github.com/n8n-io/n8n/releases/tag/n8n%402.28.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59206.json"},{"type":"ADVISORY","url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-75qm-gp28-rcq9"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59206"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:19.798615950Z"}}