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AI agent vulnerability · n8n

CVE-2026-27494: n8n has Arbitrary File Read via Python Code Node Sandbox Escape

highCVSS 4.0 7.1 · 3.1 9.9GHSA-mmgg-m5j7-f83h

Impact An authenticated user with permission to create or modify workflows could use the Python Code node to escape the sandbox. The sandbox did not sufficiently restrict access to certain built-in Python objects, allowing an attacker to exfiltrate file contents or achieve RCE. On instances using internal Task Runners (default runner mode), this could result in full compromise of the n8n host.

Published Feb 25, 2026 · Updated Feb 27, 2026

Affected packages

n8n

Ecosystem
npm
Affected
< 1.123.22
Fixed in
1.123.22
Check
npm ls n8n

n8n

Ecosystem
npm
Affected
>= 2.0.0, < 2.9.3
Fixed in
2.9.3
Check
npm ls n8n

n8n

Ecosystem
npm
Affected
>= 2.10.0, < 2.10.1
Fixed in
2.10.1
Check
npm ls n8n

Advisory details

From the GitHub Advisory Database (CC BY 4.0).

Impact

An authenticated user with permission to create or modify workflows could use the Python Code node to escape the sandbox. The sandbox did not sufficiently restrict access to certain built-in Python objects, allowing an attacker to exfiltrate file contents or achieve RCE.

On instances using internal Task Runners (default runner mode), this could result in full compromise of the n8n host. On instances using external Task Runners, the attacker might gain access to or impact other task executed on the Task Runner.

  • Task Runners must be enabled using N8N_RUNNERS_ENABLED=true.

Patches

The issue has been fixed in n8n versions 2.10.1, 2.9.3, and 1.123.22. Users should upgrade to this version 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 Code node by adding n8n-nodes-base.code to the NODES_EXCLUDE environment variable.

These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.

Credited to MarcoPoloPie, Nico-Posada.

References

How this page is made: the data panel comes from the GitHub Advisory Database, CISA’s KEV catalog, the NVD and FIRST EPSS, and updates twice a day. No analysis has been written for this entry yet. Methodology

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