CVE-2026-103247: n8n-Io n8n

High severity, CVSS 8.5. EPSS: 0.2% chance of exploitation in the next 30 days.

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 products

• n8n-Io n8n: before 1.123.80 (fixed in 1.123.80)

Published 2026-10-01. Last modified 2026-10-01.