CVE-2026-44427

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.

PUBLISHED Reserved 2026-05-06 | Published 2026-05-14 | Updated 2026-05-14 | Assigner GitHub_M

Problem types

CWE-601: URL Redirection to Untrusted Site ('Open Redirect')

Product status

References

github.com/...gistry/security/advisories/GHSA-v8vw-gw5j-w7m6

cve.org (CVE-2026-44427)

nvd.nist.gov (CVE-2026-44427)

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