Executive brief
9Router, an AI routing and token management tool, contains a security flaw that allows an authenticated user to disable the application's login requirements. By sending a specially crafted request to the settings menu, an attacker can turn off authentication for the entire system. This would allow anyone on the network to access sensitive information, including stored API keys and provider credentials, leading to a total compromise of the service and connected accounts.
Technical details
A mass assignment vulnerability (CWE-915) exists in the PATCH /api/settings endpoint of 9Router. The application fails to whitelist input fields when updating persistent settings, allowing the 'requireLogin' field to be overwritten by any authenticated user. By setting 'requireLogin' to false, the 'dashboardGuard.js' logic is bypassed, granting unauthenticated access to protected routes such as /api/keys and /api/providers. This allows for the exfiltration of sensitive credentials and API keys. The issue is fixed in version 0.5.4 by implementing field whitelisting.
Affected products
- decolua 9router < 0.5.4
Timeline
- 2026-07-10: advisory: GitHub Security Advisory published
- 2026-07-15: disclosed: CVE published to NVD
- 2026-07-15: patched: Fixed in version 0.5.4