CVE-2026-103247
Deferred Deferred - Pending Action

Credential Tampering in n8n Workflows

Publication date: 2026-10-01

Last updated on: 2026-10-01

Assigner: VulnCheck

Description
n8n versions before 1.123.80 contain a credential tampering vulnerability where duplicate node IDs bypass the workflow credential tamper guard. Attackers with editor access to shared workflows can exploit mismatched node ID and name matching to retain victim credentials and redirect secrets to attacker-controlled hosts.

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Meta Information

Published
2026-10-01
Last Modified
2026-10-01
Generated
2026-10-01
AI Q&A
2026-10-01
EPSS Evaluated
N/A
NVD
CVE-2026-103247
EUVD
EUVD-2026-90751

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
n8n n8n to 1.123.80 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-639 The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.

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Executive Summary

CVE-2026-103247 is a credential tampering vulnerability in n8n versions before 1.123.80. It allows attackers with editor access to shared workflows to exploit duplicate node IDs to bypass credential tamper guards. By mismatching node IDs and names, attackers can retain victim credentials and redirect secrets to attacker-controlled hosts.

Impact Analysis

If you use n8n versions before 1.123.80, attackers with editor access to shared workflows could steal your credentials or redirect sensitive data to unauthorized hosts. This could lead to data breaches, unauthorized access to systems, or further exploitation of connected services.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or sensitive data, violating GDPR and HIPAA requirements for data protection and confidentiality. Organizations may face compliance violations, legal penalties, and reputational damage if exploited.

Mitigation Strategies
  • Update n8n to version 1.123.80 or later to patch the vulnerability.
  • Restrict access to workflow editors to trusted users only.
  • Audit shared workflows for nodes with duplicate IDs or unexpected credential references.
  • Review nodes in workflows to ensure no credentials are retained by unauthorized nodes.

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