CVE-2026-56359

Description

## Impact An authenticated user with permission to create and share credentials could craft a malicious OAuth2 credential containing a JavaScript URL in the Authorization URL field. If a victim opened the credential and interacted with the OAuth authorization button, the injected script would execute in their browser session. ## Patches The issue has been fixed in n8n versions 2.8.0 and 2.6.4. Users should upgrade to one of these versions or later to remediate the vulnerability. ## Workarounds If upgrading is not immediately possible, administrators should consider the following temporary mitigations: - Limit credential creation and sharing permissions to fully trusted users only. - Restrict access to the n8n instance to trusted users only. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.

How to fix CVE-2026-56359

To remediate CVE-2026-56359, upgrade the affected package to a fixed version below.

• —upgrade to 2.8.0 or later

Is CVE-2026-56359 being exploited?

Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.

Affected packages (1)

• >= 2.7.0, < 2.8.0

CVSS scores

References (2)

• PATCHgithub.com/n8n-io/n8n
• WEBgithub.com/n8n-io/n8n/security/advisories/GHSA-364x-8g5j-x2pr