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.
Metrics
Affected Vendors & Products
No advisories yet.
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
Wed, 21 Jan 2026 02:15:00 +0900
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Mon, 19 Jan 2026 18:45:00 +0900
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
N8n
N8n n8n |
|
| Vendors & Products |
N8n
N8n n8n |
Mon, 19 Jan 2026 00:45:00 +0900
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Sandbox escape in n8n Python task runner allows for arbitrary code execution on the underlying host. | |
| Weaknesses | CWE-95 | |
| References |
| |
| Metrics |
cvssV3_1
|
Projects
Sign in to view the affected projects.
Status: PUBLISHED
Assigner: JFROG
Published:
Updated: 2026-01-20T16:42:55.980Z
Reserved: 2026-01-12T15:16:43.100Z
Link: CVE-2026-0863
Updated: 2026-01-20T16:42:40.085Z
Status : Received
Published: 2026-01-18T16:15:50.450
Modified: 2026-01-20T17:15:49.683
Link: CVE-2026-0863
No data.
OpenCVE Enrichment
Updated: 2026-01-19T18:19:05Z