CVE-2026-46339

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.

Affected products

9Router

Fix

Available

CVSS 3.1

10.0 CRITICAL

EPSS

3.4% (88th percentile)

Weakness

CWE-78, CWE-306

NVD status

Deferred

Published

2026-07-15