XSS in N8n-Io N8n
CVE-2026-118648
n8n before 1.123.85, 2.x before 2.43.5, and 2.44.x before 2.44.1 contains a stored cross-site scripting vulnerability because some webhook response paths, such as error responses and responses without headers, omit the sandbox Content-Security-Policy. Authenticated members who can create and activate workflows can serve HTML that runs on the n8n origin, letting scripts act with the session of users who open the webhook URL.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/n8n-io/n8n/security/advisories/GHSA-mp7q-23hg-35cf (vendor-advisory)
- www.vulncheck.com/advisories/n8n-before-1.123.85-2.43.5-and-2.44.1-stored-xss-v… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-118648?
- CVE-2026-118648 is a high-severity vulnerability in N8n-Io N8n, classified under Cross-site Scripting. CVSS score: 7.3/10. Published 2026-10-28.
- How severe is CVE-2026-118648?
- High severity. CVSS v3 base score is 7.3 out of 10.