CVE-2026-46339

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Source
https://cve.org/CVERecord?id=CVE-2026-46339
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46339.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-46339
Aliases
Published
2026-07-15T20:41:06.937Z
Modified
2026-08-04T11:49:49.736329505Z
Severity
  • 10.0 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
Summary
9Router: Unauthenticated Remote Code Execution via unprotected MCP custom plugin routes
Details

9Router is an AI router & token saver. From 0.4.30 until 0.4.37, 9Router's src/proxy.js middleware did not protect /api/cli-tools/* and /api/mcp/*, allowing unauthenticated registration of customPlugins through src/app/api/cli-tools/cowork-settings/route.js and command execution through the MCP bridge. This vulnerability is fixed in 0.4.37.

Database specific 
{
    "cwe_ids": [
        "CWE-306",
        "CWE-78"
    ],
    "cna_assigner": "GitHub_M",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46339.json"
}
References

Affected packages

Git / github.com/decolua/9router

Affected ranges

Type
GIT
Repo
https://github.com/decolua/9router
Events
Introduced
76f3d4b74e79c0e9c3a7cfcbadfee016fbd66b9b
Fixed
7f7b86f70efc21574cd4f611c9bb3a6a96c01559
Database specific 
{
    "source": "AFFECTED_FIELD",
    "extracted_events": [
        {
            "introduced": "0.4.30"
        },
        {
            "fixed": "0.4.37"
        }
    ]
}

Affected versions

v0.*
v0.4.30
v0.4.31
v0.4.33
v0.4.36

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46339.json"