| Component | n8n |
| Severity | high (CVSS 8.2) |
| CVSS vector | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N |
| Published (NVD) | 2026-06-24 |
| Last modified | 2026-06-26 |
| Affected versions | n8n < 2.4.0 |
| Fixed in | 2.4.0 |
| Weakness | CWE-89 |
| CISA KEV | not listed |
NVD 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.
What to do
- Upgrade n8n to
2.4.0or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-56351
- 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
Read more
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