CVE-2026-56677: Decolua 9router

High severity, CVSS 8.6. EPSS: 0.4% chance of exploitation in the next 30 days.

9Router is an AI router & token saver. In 0.5.4 and earlier, the POST /api/auth/oidc/test endpoint in src/app/api/auth/oidc/test/route.js passes the user-controlled issuerUrl parameter to fetchOidcDiscovery() in src/lib/auth/oidc.js without restricting private or loopback destinations, allowing unauthenticated attackers when dashboard login is disabled to scan internal services and reflect OIDC discovery fields including token_endpoint and jwks_uri.

Affected products

• Decolua 9router: up to and including 0.5.4

Published 2026-08-17. Last modified 2026-09-16.