Medium severity · published Jul 8, 2026
CVE-2026-56359
n8n - Cross-Site Scripting in Credential Management OAuth2 Authorization URL
5.4
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 15% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
N8
n8n · n8n
before 2.8.0; before 2.6.4 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-56359
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-56359
Mitigation
https://github.com/n8n-io/n8n/security/advisories/GHSA-364x-8g5j-x2pr
Third Party Advisory
https://www.vulncheck.com/advisories/n8n-cross-site-scripting-in-credential-management-oauth2-authorization-url
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