What is CVE-2026-56354?

CVE-2026-56354 is a medium-severity vulnerability in N8n, classified under Cross-site Scripting. CVSS score: 4.1/10. Published 2026-07-10.

How severe is CVE-2026-56354?

Medium severity. CVSS v3 base score is 4.1 out of 10.

XSS in N8n

CVE-2026-56354

n8n before 1.123.24, 2.10.4, and 2.12.0 (across its 1.x and 2.x branches) contains cross-site scripting and open redirect vulnerabilities in the Form Node due to unsanitized HTML description fields and overly permissive iframe sandbox poli…

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 4.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N.

Affected products

N8n — versions 0, 1.123.24, 2.0.0-rc.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-56354?: CVE-2026-56354 is a medium-severity vulnerability in N8n, classified under Cross-site Scripting. CVSS score: 4.1/10. Published 2026-07-10.
How severe is CVE-2026-56354?: Medium severity. CVSS v3 base score is 4.1 out of 10.