CVE-2026-44427
MCP Registry: Open Redirect
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-601 |
| Vendor | modelcontextprotocol |
| Product | registry |
| Published | May 14, 2026 |
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Affected Versions
modelcontextprotocol / registry
>= 1.1.0, < 1.7.5