What is CVE-2026-56358?

CVE-2026-56358 is a medium-severity vulnerability in N8n, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-06-24.

How severe is CVE-2026-56358?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in N8n

CVE-2026-56358

n8n before 1.123.25 (1.x) and before 2.11.2 (2.x), with the fix also included in 2.12.0, contains a stored cross-site scripting vulnerability in the Form Trigger node's CSS sanitization that allows authenticated users to inject malicious s…

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

N8n — versions 0, 1.123.25, 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-2026-56358?: CVE-2026-56358 is a medium-severity vulnerability in N8n, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-06-24.
How severe is CVE-2026-56358?: Medium severity. CVSS v3 base score is 5.4 out of 10.