CVE-2026-103247: Authorization Bypass Through User-Controlled Key in n8n-io n8n
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.
AI Analysis
Technical Summary
CVE-2026-103247 is an authorization bypass vulnerability in n8n versions prior to 1.123.80. The issue arises from duplicate node IDs that circumvent the workflow credential tamper guard. Attackers who have editor privileges on shared workflows can exploit mismatches between node ID and name matching to maintain access to victim credentials and redirect sensitive secrets to hosts under their control.
Potential Impact
An attacker with editor access to shared workflows can bypass protections designed to prevent credential tampering, potentially leading to unauthorized retention and redirection of sensitive credentials and secrets. This could compromise confidentiality of workflow credentials within affected n8n instances.
Mitigation Recommendations
Upgrade n8n to version 1.123.80 or later, where this vulnerability is fixed. No other mitigation guidance is provided. Patch status is confirmed by the version boundary in the affectedVersions field.
CVE-2026-103247: Authorization Bypass Through User-Controlled Key in n8n-io n8n
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.
CVSS v4.0
Score 5.8medium
Affected software
n8n-io
n8n
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-103247 is an authorization bypass vulnerability in n8n versions prior to 1.123.80. The issue arises from duplicate node IDs that circumvent the workflow credential tamper guard. Attackers who have editor privileges on shared workflows can exploit mismatches between node ID and name matching to maintain access to victim credentials and redirect sensitive secrets to hosts under their control.
Potential Impact
An attacker with editor access to shared workflows can bypass protections designed to prevent credential tampering, potentially leading to unauthorized retention and redirection of sensitive credentials and secrets. This could compromise confidentiality of workflow credentials within affected n8n instances.
Mitigation Recommendations
Upgrade n8n to version 1.123.80 or later, where this vulnerability is fixed. No other mitigation guidance is provided. Patch status is confirmed by the version boundary in the affectedVersions field.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-30T10:52:32.248Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6abe7492a43b0b3b89bd1cde
Added to database: 10/01/2026, 14:56:18 UTC
Last enriched: 10/01/2026, 15:21:47 UTC
Last updated: 10/01/2026, 19:41:31 UTC
Views: 3
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