Vulnerability · Published Feb 25, 2026 · Assigned by GitHub_M
CVE-2026-27494n8n has Arbitrary File Read via Python Code Node Sandbox Escape
High 7.1
In plain English
A high-severity security flaw in n8n from n8n-io. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
n8n is an open source workflow automation platform. Prior to versions 2.10.1, 2.9.3, and 1.123.22, 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`. 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. If upgrading is not immediately possible, administrators should consider the following temporary mitigations. Limit workflow creation and editing permissions to fully trusted users only., and/or 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | n8n | 1.123.22 | GHSA-mmgg-m5j7-f83h |
| npm | n8n | 2.9.3 | GHSA-mmgg-m5j7-f83h |
| npm | n8n | 2.10.1 | GHSA-mmgg-m5j7-f83h |
Affected products (as reported)
Weakness: CWE-497 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
References
- https://github.com/n8n-io/n8n/security/advisories/GHSA-mmgg-m5j7-f83h x_refsource_CONFIRM
- https://github.com/n8n-io/n8n/releases/tag/n8n@1.123.22 x_refsource_MISC
- https://github.com/n8n-io/n8n/releases/tag/n8n@2.10.1 x_refsource_MISC
- https://github.com/n8n-io/n8n/releases/tag/n8n@2.9.3 x_refsource_MISC