Vulnerability · Published Jul 8, 2026 · Assigned by VulnCheck
CVE-2026-59257n8n - SQL Injection in MySQL v1 executeQuery Operation via Expression Interpolation
Medium 5.3
In plain English
A medium-severity SQL injection in n8n from n8n. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | n8n | 1.123.61 | GHSA-hwmj-qg4v-cvg9 |
| npm | n8n | 2.28.1 | GHSA-hwmj-qg4v-cvg9 |
| npm | n8n | 2.27.4 | GHSA-hwmj-qg4v-cvg9 |
Affected products (as reported)
Weakness: CWE-89 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N