CVE-2026-59254

Summary

n8n: External Secrets Accessible via Workflow Expressions Outside Credentials

Severity

medium

EPSS

0.4% (p30)

CWE

CWE-639

Also known as

GHSA-2434-3x6q-8r99

Published

2026-07-22

Updated

2026-07-22

Advisory details

Impact

External secrets were incorrectly resolved in workflow node expressions, where they are not intended to be available. An authenticated user with project editor access could read the plaintext value of external secrets by referencing them in a node expression, without needing explicit secrets access permissions.

This issue only affects instances with the external secrets feature configured.

Patches

The issue has been fixed in n8n versions 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 project membership to fully trusted users only.
• Avoid granting editor access to projects on instances where external secrets are configured.

These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.

References

• https://github.com/advisories/GHSA-2434-3x6q-8r99
• https://github.com/n8n-io/n8n/security/advisories/GHSA-2434-3x6q-8r99
• https://nvd.nist.gov/vuln/detail/CVE-2026-59254
• https://github.com/n8n-io/n8n/releases/tag/n8n%402.27.4
• https://github.com/n8n-io/n8n/releases/tag/n8n%402.28.1
• https://www.vulncheck.com/advisories/n8n-external-secrets-disclosure-via-workflow-node-expressions

Related advisories

• CVE-2026-65016 — high · npm/n8n
• GHSA-mwq7-vcmc-cm4q — high · npm/n8n
• CVE-2026-59253 — medium · npm/n8n
• CVE-2026-59259 — medium · npm/n8n
• CVE-2026-86083 — high · npm/n8n
• CVE-2026-86082 — high · npm/n8n
• CVE-2026-86081 — high · npm/n8n
• CVE-2026-86075 — high · npm/n8n

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