n8n: Shared Credential Header Leak via HTTP Request Pagination Expression
HighCVE-2026-59209 · Published Jul 22, 2026
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| n8n npm | < 1.123.61 | 1.123.61 |
| >= 2.28.0, < 2.28.1 | 2.28.1 | |
| >= 2.0.0-rc.0, < 2.27.4 | 2.27.4 |
Details and references
## Impact An 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. This issue only affects instances with `N8N_EXPRESSION_ENGINE=vm` set, where paginated HTTP Request workflows using shared credentials are accessible to non-owner users. ## Patches The 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. ## Workarounds If upgrading is not immediately possible, administrators should consider the following temporary mitigations: - Restrict workflow sharing to fully trusted users only. - Avoid sharing credentials with use-only access to untrusted users on workflows that use HTTP Request nodes with pagination enabled. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.
- CVSS 4.0
- CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- Severity from
- GitHub (reviewed advisory)
- Weakness
- CWE-200
- Also known as
- CVE-2026-59209
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| Jul 22 | n8n: Stored DOM XSS via Resource Locator `cachedResultUrl` CVE-2026-65592Highfixed in 1.123.64, 2.29.8, 2.30.1 | High | 1.123.64, 2.29.8, 2.30.1 |
| Jul 22 | n8n: Google Service Account Private Key Exposed in JWT Header CVE-2026-65599Mediumfixed in 1.123.64, 2.29.8, 2.30.1 | Medium | 1.123.64, 2.29.8, 2.30.1 |
| Jul 22 | n8n: Prototype Pollution via Workflow Credentials Leads to Unauthenticated User and Project Enumeration CVE-2026-59206Highfixed in 1.123.61, 2.27.4, 2.28.1 | High | 1.123.61, 2.27.4, 2.28.1 |