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CVE-2026-103249

n8n before 1.123.80, 2.39.6, and 2.40.1 Stored DOM XSS via Resource Locator

CVSS 4.0 6.9 MEDIUMCVSS 3.1 7.6 HIGHCheck source for fixed versionsKEV status unknown

Original advisory

Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.

cve-program · CVE-2026-103249

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-103249

Published

n8n

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "n8n-io",
                    "product": "n8n",
                    "defaultStatus": "unaffected",
                    "packageURL": "pkg:npm/n8n",
                    "versions": [
                        {
                            "version": "0",
                            "status": "affected",
                            "versionType": "semver",
                            "lessThan": "1.123.80"
                        },
                        {
                            "version": "2.0.0",
                            "status": "affected",
                            "versionType": "semver",
                            "lessThan": "2.39.6"
                        },
                        {
                            "version": "2.40.0",
                            "status": "affected",
                            "versionType": "semver",
                            "lessThan": "2.40.1"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON