Vulnerability · Published Oct 1, 2026 · Assigned by VulnCheck

CVE-2026-103249n8n before 1.123.80, 2.39.6, and 2.40.1 Stored DOM XSS via Resource Locator

High 7.6

In plain English

A high-severity cross-site scripting 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 12% of all known vulnerabilities).

Severity (CVSS 3.1)7.6High

Exploit odds (30 days)0.2%top 88.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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 (as reported)

Vendor	Product	Versions
n8n-io	n8n	0 – before 1.123.802.0.0 – before 2.39.62.40.0 – before 2.40.1

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N

References

GitHub Security Advisory (GHSA-c2wp-6fgc-xjq4) vendor-advisory
VulnCheck Advisory: n8n before 1.123.80, 2.39.6, and 2.40.1 Stored DOM XSS via Resource Locator third-party-advisory