CVE-2026-59257
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.
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | n8n | < 1.123.61 | 1.123.61 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| N8n | N8n | before 1.123.61 from 2.0.0 before 2.27.4 Version 2.28.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-hwmj-qg4v-cvg9
- https://github.com/n8n-io/n8n/security/advisories/GHSA-hwmj-qg4v-cvg9
- https://nvd.nist.gov/vuln/detail/CVE-2026-59257
- https://github.com/n8n-io/n8n/releases/tag/n8n@1.123.61
- https://github.com/n8n-io/n8n/releases/tag/n8n@2.27.4
- https://github.com/n8n-io/n8n/releases/tag/n8n@2.28.1
- https://www.vulncheck.com/advisories/n8n-sql-injection-in-mysql-v1-executequery-operation-via-expression-interpolation