Vulnerability in Decolua 9router

CVE-2026-56679

9Router is an AI router & token saver. Prior to 0.5.4, the PATCH /api/settings endpoint writes the entire request body to persistent settings without a field whitelist, allowing an authenticated user to set security-critical fields such as requireLogin and disable authentication for the whole application, exposing protected routes such as /api/keys and /api/providers to unauthenticated access. This issue is reported as fixed in version 0.5.4.

Vulnerability class: Mass Assignment

EPSS: 0.005 (41.9th percentile) — read the EPSS interpretation.