---
id: CVE-2026-86078
title: n8n is an open source workflow automation platform
summary: >-
  n8n is an open source workflow automation platform. Prior to 2.37.7 and
  2.38.2, the Instance AI workflow summary used node names and connection keys
  from stored workflows as ordinary object keys. A workflow submitted through
  the REST API…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-1321
vendor: n8n
product: n8n
affected:
  - n8n < 2.37.7
  - 'n8n >= 2.38.0, < 2.38.2'
patched:
  - n8n 2.38.2
published: '2026-09-08'
updated: '2026-09-11'
sourceUpdated: '2026-09-11T18:21:20.657'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-86078'
references:
  - url: 'https://github.com/n8n-io/n8n/releases/tag/n8n@2.37.7'
    label: security-advisories@github.com
  - url: 'https://github.com/n8n-io/n8n/releases/tag/n8n@2.38.2'
    label: security-advisories@github.com
  - url: 'https://github.com/n8n-io/n8n/security/advisories/GHSA-679f-58pq-4v2c'
    label: security-advisories@github.com
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-86078'
  - url: 'https://github.com/advisories/GHSA-679f-58pq-4v2c'
tags:
  - nvd
  - cve.org
  - ghsa
  - npm
epss: 0.00586
epssPercentile: 0.45696
aliases:
  - GHSA-679f-58pq-4v2c
ecosystem: npm
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-09T15:49:54.950085Z'
scores:
  nvd: 6.5
  cna: 6
ingestedAt: '2026-09-08T22:12:31.038Z'
---

## Overview

n8n is an open source workflow automation platform. Prior to 2.37.7 and 2.38.2, the Instance AI workflow summary used node names and connection keys from stored workflows as ordinary object keys. A workflow submitted through the REST API could contain __proto__ or constructor, causing nested writes to reach Object.prototype in the main n8n process and disrupt later requests. The affected function is summarizeWorkflowStructure in packages/@n8n/instance-ai/src/tools/workflows/summarize-workflow.ts. This issue is fixed in versions 2.37.7 and 2.38.2.

## Affected

- `n8n < 2.37.7`
- `n8n >= 2.38.0, < 2.38.2`

## Remediation

Upgrade past the affected range:

- `n8n 2.38.2`

## Package advisory (CVE-2026-86078)

Affected packages:

- `n8n >= 2.38.0, < 2.38.2`
- `n8n < 2.37.7`

Patched in:

- `n8n 2.38.2`
- `n8n 2.37.7`

Source: https://github.com/advisories/GHSA-679f-58pq-4v2c