What’s Vulnerable › Vulnerabilities

CVE-2026-56351: n8n - SQL Injection in MySQL, PostgreSQL, and Microsoft SQL Nodes

• Severity: critical (CVSS 9.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-24 · updated 2026-06-26
• Weakness: CWE-89

Description

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-io n8n: before 2.4.0 — fixed in 2.4.0

How to fix

Upgrade to a fixed version: n8n-io n8n 2.4.0. Check the vendor advisory for mitigations.

References

• https://github.com/n8n-io/n8n/security/advisories/GHSA-f3f2-mcxc-pwjx
• https://www.vulncheck.com/advisories/n8n-sql-injection-in-mysql-postgresql-and-microsoft-sql-nodes

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