None severityGHSA Advisory· Published May 14, 2026· Updated May 15, 2026
CVE-2026-44427
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/modelcontextprotocol/registryGo | >= 1.1.0, < 1.7.5 | 1.7.5 |
Affected products
3- Range: >= 1.1.0, < 1.7.5
- osv-coords2 versions
< 2.15.4-r2+ 1 more
- (no CPE)range: < 2.15.4-r2
- (no CPE)range: < 2.15.4-r2
Patches
Vulnerability mechanics
References
6- github.com/advisories/GHSA-v8vw-gw5j-w7m6ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-44427ghsaADVISORY
- github.com/modelcontextprotocol/registry/commit/1201cbd82b2cf6d4b56edfc05c763059a12f9fdbghsaWEB
- github.com/modelcontextprotocol/registry/pull/1227ghsaWEB
- github.com/modelcontextprotocol/registry/releases/tag/v1.7.5ghsaWEB
- github.com/modelcontextprotocol/registry/security/advisories/GHSA-v8vw-gw5j-w7m6nvdWEB
News mentions
0No linked articles in our index yet.