Is this vulnerability remotely exploitable over the internet?

It can be exploited remotely if the n8n instance is exposed and an attacker has valid credentials with permissions to create or edit workflows containing Python Code. The vulnerability does not itself bypass authentication; it elevates what an authenticated user can do.

What level of access does an attacker need to exploit this?

An attacker needs an authenticated n8n account with basic permissions sufficient to define or modify a workflow that uses the Python Code block executed by the python-task-executor. No special administrator privileges are required beyond that workflow authoring capability.

What is the safest general fix pattern?

The most robust fix is to redesign the sandbox so that user-provided Python cannot dynamically reconstruct restricted operations—this typically means removing or heavily constraining dynamic evaluation features, enforcing strict whitelists on accessible APIs, and verifying that exception paths cannot re-enable blocked functionality. Where possible, replace generic "run arbitrary code" nodes with narrowly scoped, parameterized operations.

Severity:

HIGH RISK

(8.5)

Dynamic Code Evaluation Bypass (CWE-95) in n8n Python Task Executor Sandbox

CVE-2026-0863

Published:

Jan 18, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-306

CRITICAL RISK

CRITICAL

(9.8)

Missing Authentication for Forgot-Password Email Change API (CWE-306)

Account Takeover / Loss of Account Control

February 17, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in node-sonos-http-api TTS Provider for macOS

Remote Code Execution on the Server Host

February 17, 2026

Vulnerability Type

Category:

Dynamic Code Evaluation / Sandbox Escape

CWE:

CWE-95;CWE-94

Impact:

Remote Code Execution and Sandbox Escape

Severity:

HIGH RISK

(8.5)

CVSS Version:

3.1

Vulnerability Type

Category:

Dynamic Code Evaluation / Sandbox Escape

CWE:

CWE-95;CWE-94

Impact:

Remote Code Execution and Sandbox Escape

Severity:

HIGH RISK

(8.5)

CVSS Version:

3.1

Catch This CVE While Code Is Being Written

Detect vulnerable code directly in pull requests, so CVEs are fixed before merge.

Get Started

Ship clean & secure code faster

START 14 DAYS FREE TRIAL

BOOK A DEMO

Made with Love in San Francisco

355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Made with Love in San Francisco

355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Made with Love in San Francisco

355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Dynamic Code Evaluation Bypass (CWE-95) in n8n Python Task Executor Sandbox

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

CRITICAL RISK

CRITICAL

(9.8)

Missing Authentication for Forgot-Password Email Change API (CWE-306)

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in node-sonos-http-api TTS Provider for macOS

Vulnerability Type

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

Product

Pricing

Company

Legal

Developers

Compare

Product

Pricing

Company

Legal

Developers

Compare

Product

Pricing

Company

Legal

Developers

Compare