CVE-2026-103247: n8n before 1.123.80 Credential Tampering via Duplicate Node IDs
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.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
n8nto a version that resolves this vulnerability.Fixed in 1.123.80
Event History
Frequently Asked Questions
Who is exposed to this issue?
Shared n8n workflows are exposed when an attacker has editor access to them. The issue affects n8n versions before 1.123.80.
What does an attacker need to exploit it?
The attacker needs editor-level access to a shared workflow. They exploit duplicate node IDs and mismatched node ID and name matching to bypass the credential tamper guard.
What is the potential impact of successful exploitation?
An attacker can retain a victim's credentials while redirecting secrets to attacker-controlled hosts. This can expose credential material and enable unauthorized changes or disruption involving the affected workflow.