CVE-2026-44427

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Source
https://cve.org/CVERecord?id=CVE-2026-44427
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44427.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-44427
Aliases
Related
Published
2026-05-14T21:07:34.364Z
Modified
2026-07-08T08:13:28.159164198Z
Severity
  • 0.0 (None) CVSS_V4 - 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 CVSS Calculator
Summary
MCP Registry: Open Redirect
Details

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.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44427.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-601"
    ]
}
References

Affected packages

Git / github.com/modelcontextprotocol/registry

Affected ranges

Type
GIT
Repo
https://github.com/modelcontextprotocol/registry
Events
Introduced
ae00f70eaf2202970d74f5d459fd174ab8445a8a
Fixed
1201cbd82b2cf6d4b56edfc05c763059a12f9fdb
Database specific 
{
    "source": "AFFECTED_FIELD",
    "extracted_events": [
        {
            "introduced": "1.1.0"
        },
        {
            "fixed": "1.7.5"
        }
    ]
}

Affected versions

v1.*
v1.1.0
v1.2.0
v1.2.1
v1.2.2
v1.2.3
v1.3.0
v1.3.1
v1.3.10
v1.3.2
v1.3.3
v1.3.4
v1.3.5
v1.3.6
v1.3.7
v1.3.8
v1.3.9
v1.4.0
v1.4.1
v1.5.0
v1.6.0
v1.7.0
v1.7.1
v1.7.2
v1.7.3
v1.7.4

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44427.json"