GHSA-8398-gmmx-564h

Source

https://github.com/advisories/GHSA-8398-gmmx-564h

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/02/GHSA-8398-gmmx-564h/GHSA-8398-gmmx-564h.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-8398-gmmx-564h

Aliases

CVE-2026-25115

Published

2026-02-04T19:42:03Z

Modified

2026-03-25T03:17:01.391049Z

Severity

9.9 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
9.4 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H CVSS Calculator

Summary

n8n has a Python sandbox escape

Details

Impact

A vulnerability in the Python Code node allows authenticated users to break out of the Python sandbox environment and execute code outside the intended security boundary.

Only authenticated users are able to execute code through Task Runners.

This issue affected any deployment in which the following conditions were met:

Task Runners were enabled using N8N_RUNNERS_ENABLED=true (default: false)
Python was enabled N8N_PYTHON_ENABLED=true
Code Node was enabled (default: true)

In case the N8N_RUNNERS_MODE is set to external (default: internal) the sandbox escape is limited to the sidecar container with lower risk for lateral movement. In that case a lower high severity is more appropriate.

Patches

This vulnerability is fixed in version 2.4.8 and later.

Workarounds

If an immediate upgrade cannot be applied, the following hardening steps are recommended:

Disable the Code Node by adding n8n-nodes-base.code to the NODES_EXCLUDE environment variable
Prefer external mode for isolation: run Task Runners in external mode so that untrusted task code executes in a separate sidecar container rather than within the main n8n process. This configuration significantly reduces the risk of in-process memory disclosure caused by unsafe buffer allocations.In external mode, a launcher manages Task Runner processes in a dedicated sidecar environment, separate from the primary n8n instance. See the [n8n documentation](https://docs.n8n.io/hosting/configuration/task-runners/) for configuration details and required environment variables.

Resources

n8n Documentation — Task Runners — external mode, setup guide, and environment configuration details
n8n Documentation — Blocking nodes — how to globally disable specific nodes

Database specific

{
    "nvd_published_at": "2026-02-04T17:16:23Z",
    "github_reviewed_at": "2026-02-04T19:42:03Z",
    "cwe_ids": [
        "CWE-693"
    ],
    "severity": "CRITICAL",
    "github_reviewed": true
}

References

Affected packages

npm / n8n

Package

Name: n8n; View open source insights on deps.dev
Purl: pkg:npm/n8n

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

2.4.8

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/02/GHSA-8398-gmmx-564h/GHSA-8398-gmmx-564h.json"