User Impersonation Affecting @samanhappy/mcphub package, versions <0.12.17
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Test your applications- Snyk IDSNYK-JS-SAMANHAPPYMCPHUB-16726193
- published17 May 2026
- disclosed14 May 2026
- creditibrahmsql
Introduced: 14 May 2026
New CVE NOT AVAILABLE CWE-290 (opens in a new tab)Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade @samanhappy/mcphub to version 0.12.17 or higher.
Overview
@samanhappy/mcphub is an A hub server for mcp servers
Affected versions of this package are vulnerable to User Impersonation via the sseUserContextMiddleware process. An attacker can gain unauthorized access to user sessions and perform actions as any user, including administrators, by supplying arbitrary usernames in the URL path without authentication. This is only exploitable if bearer authentication is disabled or not configured.