CVE-2026-46339: Decolua 9router

Critical severity, CVSS 10.0. EPSS: 3.4% chance of exploitation in the next 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.

Affected products

• Decolua 9router: from 0.4.30, before 0.4.37 (fixed in 0.4.37)

Published 2026-07-15. Last modified 2026-07-16.