Description
Using string formatting and exception handling, an attacker may bypass n8n's python-task-executor sandbox restrictions and run arbitrary unrestricted Python code in the underlying operating system. The vulnerability can be exploited via the Code block by an authenticated user with basic permissions and can lead to a full n8n instance takeover on instances operating under "Internal" execution mode. If the instance is operating under the "External" execution mode (ex. n8n's official Docker image) - arbitrary code execution occurs inside a Sidecar container and not the main node, which significantly reduces the vulnerability impact.
INFO
Published Date :
2026-01-18T15:37:07.529Z
Last Modified :
2026-01-23T17:58:14.442Z
Source :
JFROG
AFFECTED PRODUCTS
The following products are affected by CVE-2026-0863 vulnerability.
| Vendors | Products |
|---|---|
| N8n |
|
REFERENCES
Here, you will find a curated list of external links that provide in-depth information to CVE-2026-0863.
