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 credentials and trick victims into clicking the OAuth authorization button, executing arbitrary scripts in their browser session with the victim's privileges.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.002 (14.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 14.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- N8n — versions 0, 2.8.0, 2.6.4
Weakness classification (CWE)
References
- github.com/n8n-io/n8n/security/advisories/GHSA-364x-8g5j-x2pr (vendor-advisory, Mitigation, Vendor Advisory)
- www.vulncheck.com/advisories/n8n-cross-site-scripting-in-credential-management-… (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.