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.
Fix
Patch, vendor advisory and mitigation references on NVD 1
- https://github.com/n8n-io/n8n/security/advisories/GHSA-hwmj-qg4v-cvg9 Mitigation, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 5.3 · n8nNVD modified 2026-10-25 20:10
Affected (CPE criteria) 2
cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*cpe:2.3:a:n8n:n8n:2.28.0:*:*:*:*:node.js:*:*
References 2
- https://github.com/n8n-io/n8n/security/advisories/GHSA-hwmj-qg4v-cvg9 Mitigation, Vendor Advisory
- https://www.vulncheck.com/advisories/n8n-sql-injection-in-mysql-v1-executequery-operation-via-expression-interpolation Third Party Advisory