CVE-2026-103249: n8n-Io n8n

High severity, CVSS 7.6. EPSS: 0.2% chance of exploitation in the next 30 days.

n8n versions before 1.123.80, from 2.0.0 before 2.39.6, and from 2.40.0 before 2.40.1 contain a stored DOM cross-site scripting vulnerability in Resource Locator parameter dropdown link handling. Workflow authors can inject malicious script URLs that execute arbitrary JavaScript in the editor origin when other users open the node dropdown and click the external-link icon, with the payload persisting across workflow imports and shares.

Affected products

• n8n-Io n8n: before 1.123.80 (fixed in 1.123.80); from 2.0.0, before 2.39.6 (fixed in 2.39.6); from 2.40.0, before 2.40.1 (fixed in 2.40.1)

Published 2026-10-01. Last modified 2026-10-01.