AI agent vulnerability · n8n

GHSA-364x-8g5j-x2pr: n8n has XSS in its Credential Management Flow

mediumCVSS 4.0 4.8 · 3.1 5.4

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.

Published Mar 27, 2026

Affected packages

n8n

Ecosystem: npm
Affected: >= 2.7.0, < 2.8.0
Fixed in: 2.8.0
Check: npm ls n8n

n8n

Ecosystem: npm
Affected: < 2.6.4
Fixed in: 2.6.4
Check: npm ls n8n

Advisory details

From the GitHub Advisory Database (CC BY 4.0).

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.

Credited to yohannslm.

References

How this page is made: the data panel comes from the GitHub Advisory Database, CISA’s KEV catalog, the NVD and FIRST EPSS, and updates twice a day. No analysis has been written for this entry yet. Methodology

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