| Component | n8n |
| Severity | high (CVSS 8.8) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| Published (NVD) | 2026-07-08 |
| Last modified | 2026-07-09 |
| Affected versions | n8n < 1.123.61 n8n >= 2.0.0, < 2.27.4 n8n = 2.28.0 |
| Fixed in | 1.123.61, 2.27.4 |
| Weakness | CWE-89 |
| CISA KEV | not listed |
NVD description
n8n before 1.123.61, 2.x before 2.27.4, and 2.28.x before 2.28.1 contains a SQL injection vulnerability in the legacy MySQL v1 node's executeQuery operation. The operation substitutes evaluated {{ ... }} expression values directly into the raw SQL string without parameterization. When a workflow uses this operation with expression-sourced values and is connected to an externally-reachable trigger (such as a Webhook node), attacker-controlled input reaching those expressions results in SQL injection, allowing execution of arbitrary SQL with the configured MySQL credentials' privileges. The MySQL v2 node, which uses parameterized queries, is not affected.
What to do
- Upgrade n8n to
1.123.61or later (or the patched release of your branch: 2.27.4). - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-59257
- https://github.com/n8n-io/n8n/security/advisories/GHSA-hwmj-qg4v-cvg9
- https://www.vulncheck.com/advisories/n8n-sql-injection-in-mysql-v1-executequery-operation-via-expression-interpolation
Read more
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