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-2026-118646 Details

ANALYZED

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

Description

n8n before 1.123.85, 2.43.5, and 2.44.1 contains a regular expression denial of service vulnerability that allows authenticated members to block the event loop via crafted glob patterns. Attackers who can create and run workflows can submit a wildcard-heavy File(s) Selector pattern causing exponential backtracking, making the UI, API, webhooks, and health checks unresponsive until restart.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CNA: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/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-m7gv-mpg5-7c9v	[email protected]	AdvisoryRemedyVendor
https://www.vulncheck.com/advisories/n8n-before-1.123.85-2.43.5-and-2.44.1-redos-via-read-write-files-node	[email protected]	Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-1333	Inefficient Regular Expression Complexity	[email protected]

Affected Products

Product	Versions
n8n	< 1.123.85 (semver) < 2.44.1 (semver) < 2.43.5 (semver)
CPE cpe:2.3:a:n8n:n8n::::::node.js::* Remediation Upgrade: 1.123.85moderate effort Upgrade: 2.44.1moderate effort Upgrade: 2.43.5moderate effort Mitigation:low effort Restrict n8n instance access to fully trusted users only. Mitigation:low effort Disable the Read/Write Files node by adding `n8n-nodes-base.readWriteFile` to the `NODES_EXCLUDE` environment variable if it is not required. Mitigation:low effort Audit existing workflows for Read/Write Files nodes with unusual File(s) Selector values and remove or correct them.

Product

Versions

n8n

< 1.123.85 (semver)

< 2.44.1 (semver)

< 2.43.5 (semver)

CPE

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

Remediation

Upgrade: 1.123.85moderate effort
Upgrade: 2.44.1moderate effort
Upgrade: 2.43.5moderate effort
Mitigation:low effort
Restrict n8n instance access to fully trusted users only.
Mitigation:low effort
Disable the Read/Write Files node by adding `n8n-nodes-base.readWriteFile` to the `NODES_EXCLUDE` environment variable if it is not required.
Mitigation:low effort
Audit existing workflows for Read/Write Files nodes with unusual File(s) Selector values and remove or correct them.

Change History

2 change records found show changes

Date	Action	Recorded By
Nov 4, 2026	CVE Modified	CISA-ADP
Oct 28, 2026	New CVE Received	[email protected]