CVE-2026-46339

9Router: Unauthenticated Remote Code Execution via unprotected MCP custom plugin routes

Published: Jul 15, 2026Updated: Jul 16, 2026 Sources: CVE List NVDCWE-78

10.0CRITICAL

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:CScope

Changed

Impact

C:HConfidentiality

High

I:HIntegrity

High

A:HAvailability

High

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Weaknesses

CWE-78 CWE-306

Affected Products

decolua

commercialaka 9router

9routerEmbedded

Networking Infrastructure / router-switch

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

3 techniques

Execution

Initial Access

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References

https://github.com/decolua/9router/security/advisories/GHSA-fhh6-4qxv-rpqj

github.com

https://github.com/decolua/9router/commit/992f4db4a0d858bcc86b4786f2abab117a6ccdf8

github.com

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