{"id":"CVE-2026-59209","aliases":["GHSA-q3j5-8vrg-4p9q"],"url":"https://o3.security/vulnerability/CVE-2026-59209","summary":"n8n: Shared Credential Header Leak via HTTP Request Pagination Expression","details":"## Impact\nAn authenticated member with use-only editor access to a shared workflow could read credential-populated headers exposed via the `$request` object inside an HTTP Request node's pagination expression. When an HTTP Header Auth credential is applied to a paginated request, the secret is present in `$request.headers` when pagination expressions are evaluated. A user-controlled expression could read that secret, copy it into item data, and exfiltrate it through a later HTTP Request node, bypassing credential domain restrictions, since the secret leaves via item data rather than the credential's own request mechanism.\n\nThis issue only affects instances with `N8N_EXPRESSION_ENGINE=vm` set, where paginated HTTP Request workflows using shared credentials are accessible to non-owner users.\n\n## Patches\nThe issue has been fixed in n8n versions 1.123.61, 2.27.4, and 2.28.1. Users should upgrade to one of these versions or later to remediate the vulnerability.\n\n## Workarounds\nIf upgrading is not immediately possible, administrators should consider the following temporary mitigations:\n- Restrict workflow sharing to fully trusted users only.\n- Avoid sharing credentials with use-only access to untrusted users on workflows that use HTTP Request nodes with pagination enabled.\n\nThese workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.","published":"2026-07-09T15:32:27.537Z","modified":"2026-08-12T03:51:20.261816375Z","cvss":null,"epss":{"score":0.00402,"percentile":0.33797,"asOf":"2026-09-15"},"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-2026-59209.json"},{"type":"ADVISORY","url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-q3j5-8vrg-4p9q"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-59209"},{"type":"PACKAGE","url":"https://github.com/n8n-io/n8n"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:20.261816375Z"}}