CVE-2026-59257

n8n - SQL Injection in MySQL v1 executeQuery Operation via Expression Interpolation

State: Published
Severity: 5.3 Medium
Published: Jul 8, 2026
Updated: Oct 29, 2026
Reserved: Jul 4, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	5.3 Medium	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	VulnCheck

Weaknesses

CWE-89 Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

Affected Products

Product	Versions
n8nn8n	before 1.123.61Affected 1.123.61Not affected
n8nn8n	2.28.0 to before 2.28.1Affected 2.28.1Not affected
n8nn8n	2.0.0-rc.0 to before 2.27.4Affected 2.27.4Not affected

References

GitHub Security Advisory (GHSA-hwmj-qg4v-cvg9)vendor-advisory
VulnCheck Advisory: n8n - SQL Injection in MySQL v1 executeQuery Operation via Expression Interpolationthird-party-advisory

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