Vulnerability Report

CVE-2026-0863

RCE

Title: Python Code Injection in n8n

RCE

Proof Of Concept

No public PoC currently indexed for CVE-2026-0863.

CWE Category CWE-95

Published Date Jan 18, 2026

Modified Date Feb 10, 2026

Exploit Status Not Found

Score 8.5 CVSS v3.1

Exploit Probability (EPSS)

8.50%

Vulnerability Summary

CVE-2026-0863: 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.

Impacted Vendors

n8n 1

Reference Links

https://github.com/n8n-io/n8n/commit/b73a4283cb14e0f27ce19692326f362c7bf3da02 https://research.jfrog.com/vulnerabilities/n8n-python-runner-sandbox-escape-jfsa-2026-001651077/

CVSS v3.1

Source Entity [email protected]

Severity HIGH

8.5

Attack Vector

NETWORK

Complexity

HIGH

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

CHANGED

RAW VECTOR CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H