Not a U.S. government website. NDD is an independent vulnerability database by Volerion and is not affiliated with or endorsed by NIST or NVD.

CVE-2026-110843 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URL	Source(s)	Tag(s)
https://github.com/n8n-io/n8n/security/advisories/GHSA-3qcw-p65v-c7vq	[email protected]	AdvisoryRemedyVendor
https://www.vulncheck.com/advisories/n8n-before-2.41.4-and-2.42.1-unauthenticated-unbounded-oauth-client-persistence-via-authorize-endpoint	[email protected]	Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-770	Allocation of Resources Without Limits or Throttling	[email protected]

Affected Products

Product	Versions
n8n	< 2.41.4 (semver) < 2.42.1 (semver)
CPE cpe:2.3:a:n8n:n8n::::::node.js::* Remediation Upgrade: >= 2.41.4moderate effort Upgrade: >= 2.42.1moderate effort Mitigation:low effort Restrict network access to the n8n instance to trusted users and systems only. Mitigation:low effort Deactivate or reconfigure any workflows using Form Trigger or Chat Trigger nodes with n8nUserAuth authentication until the instance is patched. Mitigation:low effort Monitor database size for unexpected growth and set filesystem-level disk usage alerts.

Product

Versions

n8n

< 2.41.4 (semver)

< 2.42.1 (semver)

CPE

cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*

Remediation

Upgrade: >= 2.41.4moderate effort
Upgrade: >= 2.42.1moderate effort
Mitigation:low effort
Restrict network access to the n8n instance to trusted users and systems only.
Mitigation:low effort
Deactivate or reconfigure any workflows using Form Trigger or Chat Trigger nodes with n8nUserAuth authentication until the instance is patched.
Mitigation:low effort
Monitor database size for unexpected growth and set filesystem-level disk usage alerts.

Change History

2 change records found show changes

Date	Action	Recorded By
Oct 16, 2026	CVE Modified	CISA-ADP
Oct 14, 2026	New CVE Received	[email protected]