CVE-2026-59257 n8n - SQL Injection in MySQL v1 executeQuery Operation via Expression Interpolation
Attackers can execute arbitrary SQL commands via expression interpolation in the legacy MySQL v1 node when connected to external triggers.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-59257?
CVE-2026-59257 is a medium-severity SQL injection vulnerability in N8n N8n, published on 8 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
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.
Weakness: CWE-89
Which versions are affected by CVE-2026-59257?
6 open source packages ship an affected version, including n8n. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
n8n npm | All versions | 1.123.61 |
n8n npm | All versions | 1.123.61 |
n8n npm | From 2.0.0-rc.0 | 2.27.4 |
n8n npm | From 2.0.0-rc.0 | 2.27.4 |
n8n npm | From 2.28.0 | 2.28.1 |
n8n npm | From 2.28.0 | 2.28.1 |
Products include N8n N8n.
How do I fix CVE-2026-59257?
Upgrade n8n to a fixed version for your release line: 1.123.61, 2.27.4 or 2.28.1.
Use parameterised queries everywhere and never build SQL by joining strings. Upgrade affected software first; a web application firewall only buys time. More about SQL injection.
Is CVE-2026-59257 being exploited?
There is no known exploitation of CVE-2026-59257 in the wild and no public exploit code.
Other vulnerabilities in N8n N8n
- CVE-2025-68613 n8n Improper Control of Dynamically-Managed Code Resources
- CVE-2026-21877 n8n is vulnerable to Remote Code Execution via Arbitrary File Write
- CVE-2026-21858 n8n Vulnerable to Unauthenticated File Access via Improper Webhook Request Handling
- CVE-2026-1470 n8n Unsafe Workflow Expression Evaluation Allows Remote Code Execution
- CVE-2025-68668 n8n Vulnerable to Arbitrary Command Execution in Pyodide based Python Code Node
Sources
Also known as CLEANSTART-2026-OK91929, GHSA-hwmj-qg4v-cvg9, MINI-84f3-3f43-q37g.