CVE-2026-118646

Medium

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.

SeverityMedium

CVSS6.5

Exploit probability—

ProductN8n

PublishedOct 28, 2026

First seenNov 4, 2026

Weakness typeCWE-1333CWE-1333

How to fix

Update

n8n-io n8n1.123.85, 2.44.1, 2.43.5 or later

Vendor advisories

github.com/n8n-io/n8n/security/advisories/GHSA-m7gv-mpg5-7c9v

Affected products

Product	Affected versions	Fixed in
n8n-io n8n	v < 1.123.85, 2.44.0 ≤ v < 2.44.1, 2.0.0 ≤ v < 2.43.5	1.123.85, 2.44.1, 2.43.5

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