What is CVE-2026-56359?

CVE-2026-56359 is a medium-severity vulnerability in N8n, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-07-08.

How severe is CVE-2026-56359?

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

XSS in N8n

CVE-2026-56359

n8n before 2.8.0 contains a cross-site scripting vulnerability in the credential management flow where authenticated users can inject malicious JavaScript URLs into OAuth2 credential Authorization URL fields. Attackers can craft malicious…

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, 2.8.0, 2.6.4

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

disclosure@vulncheck.com (vendor-advisory, Mitigation, Vendor Advisory)
disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2026-56359?: CVE-2026-56359 is a medium-severity vulnerability in N8n, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-07-08.
How severe is CVE-2026-56359?: Medium severity. CVSS v3 base score is 5.4 out of 10.