{"schemaVersion":3,"id":"CVE-2026-44427","aliases":["CGA-2mg8-whx6-5273","CGA-rx5v-xgvr-w43c","GHSA-v8vw-gw5j-w7m6","GO-2026-5658"],"status":"published","duplicateOf":null,"title":null,"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. 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