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TI-2026-42394 Aliases CVE-2026-59254GHSA-2434-3x6q-8r99

n8n - External Secrets Disclosure via Workflow Node Expressions

Priority LOW 28CWE-639Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
None · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-639.

Summary

n8n before 2.28.1 contains an information disclosure vulnerability where external secrets are incorrectly resolved in workflow node expressions outside credentials scope. Authenticated project editors can read plaintext external secret values by referencing them in node expressions without requiring explicit secrets access permissions.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00364 30th percentileScored 2026-11-07
Fix Fixed n8n (n8n): 2.28.1, 2.27.4n8n (npm): 2.28.1, 2.27.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
n8nn8n2.28.0 to before 2.28.12.28.1Patch availableCNA
n8nn8nbefore 2.27.42.27.4Patch availableCNA
—n8n (npm)2.28.0 to before 2.28.12.28.1Patch availableGHSA-2434-3x6q-8r99
—n8n (npm)before 2.27.42.27.4Patch availableGHSA-2434-3x6q-8r99
  • n8n Vendorn8n Affected 2.28.0 to before 2.28.1 Fixed in 2.28.1 Patch available CNA
  • n8n Vendorn8n Affected before 2.27.4 Fixed in 2.27.4 Patch available CNA
  • n8n (npm) Vendor— Affected 2.28.0 to before 2.28.1 Fixed in 2.28.1 Patch available GHSA-2434-3x6q-8r99
  • n8n (npm) Vendor— Affected before 2.27.4 Fixed in 2.27.4 Patch available GHSA-2434-3x6q-8r99

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*——n8n
  • cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:* Versions — — ·n8n

Remediation

  • Fix · CNA n8n (n8n) Fixed in 2.28.1
  • Fix · CNA n8n (n8n) Fixed in 2.27.4
  • Fix · GHSA-2434-3x6q-8r99 n8n (npm) Fixed in 2.28.1 Advisory →
  • Fix · GHSA-2434-3x6q-8r99 n8n (npm) Fixed in 2.27.4 Advisory →

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    n8n 2.27.4, 2.28.1

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-42399 n8n - Permission Bypass via Expression Parser Mismatch in External SecretsPriority LOW 27
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-59254
  2. 2026-10-03 Alias added: GHSA-2434-3x6q-8r99
  3. 2026-10-29 Affected versions changed · CNA

References

Advisory 2

Other 3

  • TI-2025-42131 n8n Vulnerable to Remote Code Execution via Expression Injection KEVCVSS 3.1CRITICAL 10.0
  • TI-2026-17560 n8n Vulnerable to Unauthenticated File Access via Improper Webhook Request Handling CVSS 3.1CRITICAL 10.0
  • TI-2026-01167 Authenticated users can bypass the Expression sandbox mechanism to achieve full remote… CVSS 3.1CRITICAL 9.9
  • TI-2026-00644 Sandbox escape in n8n Python task runner allows for arbitrary code execution on the underlying host. CVSS 3.1CRITICAL 9.9
  • TI-2026-82991 Code execution in n8n via deprecated Function nodes CVSS 4.0HIGH 8.7
  • TI-2025-35293 An arbitrary file upload vulnerability in the Chat Trigger component of N8N v1.95.3… CVSS 3.1HIGH 8.8
See all 233 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences