n8n has a Python Task Runner Sandbox Escape Vulnerability
High7.5CVE-2026-42234 · Published Apr 29, 2026 · updated May 8, 2026
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| n8n npm | < 1.123.32 | 1.123.32 |
| >= 2.18.0, < 2.18.1 | 2.18.1 | |
| >= 2.17.0, < 2.17.4 | 2.17.4 |
Details and references
## Impact 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. ## Patches The issue has been fixed in n8n versions 1.123.32, 2.17.4, and 2.18.1. Users should upgrade to one of these versions or later to remediate the vulnerability. ## Workarounds If upgrading is not immediately possible, administrators should consider the following temporary mitigations: - Limit workflow creation and editing permissions to fully trusted users only. - Disable the Python Code node by adding `n8n-nodes-base.code` to the `NODES_EXCLUDE` environment variable, or disable the Python Task Runner entirely. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Severity from
- GitHub (reviewed advisory)
- Weakness
- CWE-94
- Also known as
- CVE-2026-42234
More n8n advisories
All n8n| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Apr 29 | n8n has SQL Injection in Snowflake and MySQL Nodes CVE-2026-42237Medium8.2fixed in 1.123.32, 2.17.4, 2.18.1 | Medium8.2 | 1.123.32, 2.17.4, 2.18.1 |
| Apr 29 | n8n has SQL Injection in Oracle Database Node via Limit Field CVE-2026-42233Medium9.8fixed in 1.123.32, 2.17.4, 2.18.1 | Medium9.8 | 1.123.32, 2.17.4, 2.18.1 |
| Apr 29 | n8n has Open Redirect in MCP OAuth Consent Flow CVE-2026-42230Medium4.7fixed in 1.123.32, 2.17.4, 2.18.1 | Medium4.7 | 1.123.32, 2.17.4, 2.18.1 |
| Apr 29 | n8n has SQL Injection in SeaTable Node CVE-2026-42229Medium6.8fixed in 1.123.32, 2.17.4, 2.18.1 | Medium6.8 | 1.123.32, 2.17.4, 2.18.1 |
| Apr 29 | n8n Vulnerable to Hijacking of Unauthenticated Chat Execution CVE-2026-42228Medium5.4fixed in 1.123.32, 2.17.4, 2.18.1 | Medium5.4 | 1.123.32, 2.17.4, 2.18.1 |
| Apr 29 | n8n Vulnerable to Unauthenticated Denial of Service via MCP Client Registration CVE-2026-42236High7.5fixed in 1.123.32, 2.17.4, 2.18.1 | High7.5 | 1.123.32, 2.17.4, 2.18.1 |