---
id: CVE-2026-86075
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 OAuth Dynamic Client Registration endpoint bounded redirect_uris
  but accepted arbitrarily large client_name and grant_types values. An
  unauthenticated re…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-770
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: '2026-09-11T18:20:42.783'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-86075'
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-hh89-3r9w-qj3j'
    label: security-advisories@github.com
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-86075'
  - url: 'https://github.com/advisories/GHSA-hh89-3r9w-qj3j'
tags:
  - nvd
  - cve.org
  - ghsa
  - npm
epss: 0.00609
epssPercentile: 0.47036
aliases:
  - GHSA-hh89-3r9w-qj3j
ecosystem: npm
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-09T15:51:52.294118Z'
scores:
  nvd: 7.5
  cna: 8.7
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 OAuth Dynamic Client Registration endpoint bounded redirect_uris but accepted arbitrarily large client_name and grant_types values. An unauthenticated remote caller could repeatedly persist oversized values in oauth_clients and exhaust database storage. The affected validation is in packages/cli/src/modules/oauth-server/oauth-server.service.ts, including MAX_CLIENT_NAME_LENGTH and MAX_GRANT_TYPES. 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-2026-86075)

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-hh89-3r9w-qj3j