Is CVE-2026-56359 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-56359?

CVE-2026-56359 has a CVSS v3 severity of MEDIUM (5.4).

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CVE-2026-56359

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.