CVE-2026-44427
MCP Registry: Open Redirect
- State
- Published
- Severity
- 0.0 None
- Published
- May 14, 2026
- Updated
- May 15, 2026
- Reserved
- May 6, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 0.0 None | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N | GitHub_M |
Weaknesses
- CWE-601 URL Redirection to Untrusted Site ('Open Redirect')
Affected Products
| Product | Versions |
|---|---|
registrymodelcontextprotocol |
|
References
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