CVE-2026-42234 n8n: Python Task Runner Sandbox Escape
Authenticated users can escape the Python sandbox to execute arbitrary code on the task runner container in n8n instances with the Python Task Runner enabled.
- 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-2026-42234?
CVE-2026-42234 is a high-severity code injection vulnerability in N8n N8n, published on 4 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
n8n is an open source workflow automation platform. Prior to versions 1.123.32, 2.17.4, and 2.18.1, an authenticated user with permission to create or modify workflows containing a Python Code Node could escape the sandbox and achieve arbitrary code execution on the task runner container. This issue only affects instances where the Python Task Runner is enabled. This issue has been patched in versions 1.123.32, 2.17.4, and 2.18.1.
Weakness: CWE-94
Which versions are affected by CVE-2026-42234?
6 open source packages ship an affected version, including n8n. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
n8n npm | All versions | 1.123.32 |
n8n npm | All versions | 1.123.32 |
n8n npm | From 2.17.0 | 2.17.4 |
n8n npm | From 2.17.0 | 2.17.4 |
n8n npm | From 2.18.0 | 2.18.1 |
n8n npm | From 2.18.0 | 2.18.1 |
Products include N8n N8n.
How do I fix CVE-2026-42234?
Upgrade n8n to a fixed version for your release line: 1.123.32, 2.17.4 or 2.18.1.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-42234 being exploited?
There is no known exploitation of CVE-2026-42234 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 GHSA-44v6-jhgm-p3m4.