CVE-2026-56351: n8n

Critical severity, CVSS 9.6. EPSS: 0.4% chance of exploitation in the next 30 days.

n8n before version 2.4.0 contains a sql injection vulnerability in MySQL, PostgreSQL, and Microsoft SQL nodes that allows authenticated users to inject arbitrary SQL through unescaped identifier values in node configuration parameters. Attackers with workflow creation permissions can supply specially crafted table or column names to execute unauthorized database commands and compromise data integrity.

Affected products

• n8n n8n: before 2.4.0 (fixed in 2.4.0)

Published 2026-06-24. Last modified 2026-06-26.