Critical 10.0Published Jul 15, 2026

CVE-2026-463399Router: Unauthenticated Remote Code Execution via unprotected MCP custom plugin routes

Updated under an hour ago (Oct 27, 2026, 9:50 AM ET)

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It affects decolua 9router. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for decolua 9router

Exploited in the last 30 days

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.

CVSS: 10.0 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness (CWE): CWE-78, CWE-306
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Jul 16, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

decolua 9router decolua:9router (from the name)	from 0.4.30, < 0.4.37	CNA record

References

References

https://github.com/decolua/9router/security/advisories/GHSA-fhh6-4qxv-rpqj	x-refsource-confirm
https://github.com/decolua/9router/commit/992f4db4a0d858bcc86b4786f2abab117a6ccdf8	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.