---
title: "CVE-2026-103249: n8n - Stored XSS"
description: "n8n < 1.123.80, 2.0.0 < 2.39.6, and 2.40.0 < 2.40.1 contain a stored XSS caused by improper sanitization of Resource Locator parameter dropdown link, letting workflow authors execute arbitrary JavaScript in editor origin when other users interact with the node dropdown, exploit requires other users to open the node dropdown and click the external-link icon."
url: https://panop.io/threat-heartbeat/CVE-2026-103249/
---

# CVE-2026-103249 n8n - Stored XSS

n8n < 1.123.80, 2.0.0 < 2.39.6, and 2.40.0 < 2.40.1 contain a stored XSS caused by improper sanitization of Resource Locator parameter dropdown link, letting workflow authors execute arbitrary JavaScript in editor origin when other users interact with the node dropdown, exploit requires other users to open the node dropdown and click the external-link icon.

CVSS base score 7.6 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.21% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-103249)

## Details

Type

Stored XSS

Impact

Client Script Exec

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N

Published

1 October 2026

Updated

15 October 2026

Weakness

[CWE-79](https://cwe.mitre.org/data/definitions/79.html)

## Vendor fix

Update to version 1.123.80, 2.39.6, 2.40.1 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-103249](https://nvd.nist.gov/vuln/detail/CVE-2026-103249)
- [https://github.com/n8n-io/n8n/security/advisories/GHSA-c2wp-6fgc-xjq4](https://github.com/n8n-io/n8n/security/advisories/GHSA-c2wp-6fgc-xjq4)
- [https://www.vulncheck.com/advisories/n8n-before-1.123.80-2.39.6-and-2.40.1-stored-dom-xss-via-resource-locator](https://www.vulncheck.com/advisories/n8n-before-1.123.80-2.39.6-and-2.40.1-stored-dom-xss-via-resource-locator)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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