CVE-2026-56359

Medium

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.

SeverityMedium

CVSS5.4

Exploit probability—

Product

N8n

PublishedJul 8, 2026

First seenJul 8, 2026

Weakness typeCWE-79Cross-site scripting (XSS)

How to fix

Update

n8n n8n2.6.4, 2.8.0 or later
n8n2.8.0, 2.6.4 or later

Vendor advisories

github.com/n8n-io/n8n/security/advisories/GHSA-364x-8g5j-x2pr

Affected products

Product	Affected versions	Fixed in
n8n n8n	v < 2.6.4, 2.7.0 ≤ v < 2.8.0	2.6.4, 2.8.0
n8nnpm	2.7.0 ≤ v < 2.8.0, v < 2.6.4	2.8.0, 2.6.4

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