---
id: CVE-2026-110843
title: >-
  n8n before 2.41.4 and 2.42.x before 2.42.1 contains an uncontrolled resource
  consumption vulnerability in the unauthenticated OAuth authorize endpoint,
  which resolves clients by URL path but stores the caller's raw identifier as
  the reco…
summary: >-
  n8n before 2.41.4 and 2.42.x before 2.42.1 contains an uncontrolled resource
  consumption vulnerability in the unauthenticated OAuth authorize endpoint,
  which resolves clients by URL path but stores the caller's raw identifier as
  the reco…
severity: none
cwe:
  - CWE-770
published: '2026-10-14'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T23:17:24.893'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-110843'
references:
  - url: 'https://github.com/n8n-io/n8n/security/advisories/GHSA-3qcw-p65v-c7vq'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/n8n-before-2.41.4-and-2.42.1-unauthenticated-unbounded-oauth-client-persistence-via-authorize-endpoint
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-15T00:02:07.175Z'
---

## Overview

n8n before 2.41.4 and 2.42.x before 2.42.1 contains an uncontrolled resource consumption vulnerability in the unauthenticated OAuth authorize endpoint, which resolves clients by URL path but stores the caller's raw identifier as the record key. Unauthenticated attackers can send identifiers differing only in their query string to create unlimited first-party client records that bypass the registration cap, growing the database until the disk fills.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.