Vulnerability · Published Oct 28, 2026 · Assigned by VulnCheck

CVE-2026-118646n8n before 1.123.85, 2.43.5, and 2.44.1 ReDoS via Read/Write Files Node

Medium 6.5

In plain English

A medium-severity regular-expression denial of service in n8n from n8n-io. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.2%top 83.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
n8n-io	n8n	0 – before 1.123.85
n8n-io	n8n	2.44.0 – before 2.44.1
n8n-io	n8n	2.0.0 – before 2.43.5

Weakness: CWE-1333 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

GitHub Security Advisory (GHSA-m7gv-mpg5-7c9v) vendor-advisory
VulnCheck Advisory: n8n before 1.123.85, 2.43.5, and 2.44.1 ReDoS via Read/Write Files Node third-party-advisory