GHSA-3875-8gcx-7v46: n8n: Credential exfiltration via Allowed HTTP Request Domains Bypass
Summary
A security flaw in n8n (a workflow automation tool) allowed authenticated users to bypass restrictions on which websites could receive sensitive credentials, potentially exposing them. The vulnerability was in an endpoint (a URL that accepts requests) that didn't properly check the intended security rules before sending data to external servers.
Solution / Mitigation
The issue has been fixed in n8n version 2.20.0. Users should upgrade to this version or later to remediate the vulnerability. If upgrading is not immediately possible, administrators should restrict n8n access to fully trusted users only and limit credential sharing to users who genuinely require access to those credentials, though these workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.
Classification
Affected Vendors
Affected Packages
Related Issues
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Original source: https://github.com/advisories/GHSA-3875-8gcx-7v46
First tracked: May 19, 2026 at 02:00 PM
Classified by LLM (prompt v3) · confidence: 85%