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.

CVSS 4.0

4.8CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

CVSS 3.1

5.4CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS

0.2% chance of exploitation in the next 30 days; higher than 15% of CVEs (scores of 2026-10-29)

CWE

CWE-79

Published

2026-07-08

Modified

2026-10-29

Record from

the NVD, synced 2026-10-29

Affected

• n8n:n8n

Packages (OSV)

References

• https://github.com/n8n-io/n8n/security/advisories/GHSA-364x-8g5j-x2pr
• https://www.vulncheck.com/advisories/n8n-cross-site-scripting-in-credential-management-oauth2-authorization-url

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