CVE-2026-118646

MediumCVSS 6.5/10Last modified Nov 4, 2026

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 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-1333

Affected software

VendorProductVersions
n8n-ion8n< 1.123.85
n8n-ion8n>= 2.44.0, < 2.44.1
n8n-ion8n>= 2.0.0, < 2.43.5

References

Timeline

Published
Oct 28, 2026
Last modified
Nov 4, 2026
NVD status
Deferred

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CVE-2026-118646: Medium severity, CVSS 6.5 | Vulnix