CVE-2026-44427 – MCP Registry: Open Redirect

CVE ID :CVE-2026-44427

Published : May 14, 2026, 10:16 p.m. | 41 minutes ago

Description :The MCP Registry provides MCP clients with a list of MCP servers, like an app store for MCP servers. From 1.1.0 to 1.7.4, the TrailingSlashMiddleware in internal/api/server.go is vulnerable to an open redirect attack. An attacker can craft a URL with a protocol-relative path (e.g., //evil.com/) that, after trailing slash removal, results in a Location header of //evil.com — which browsers interpret as an absolute URL to an external domain. This vulnerability is fixed in 1.7.5.

Severity: 0.0 | NONE

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