CVE-2026-56675 — 9router: Reverse proxy locality collapse allows unauthenticated access to 9router /v1 APIs
9Router is an AI router & token saver. Prior to 0.5.2, 9router treats loopback requests as trusted and allows /v1/* access without an API key, so a same-host reverse proxy that …
Published: 2026-07-10 · CVSS: 8.3 · CVSS 3.1
9Router is an AI router & token saver. Prior to 0.5.2, 9router treats loopback requests as trusted and allows /v1/* access without an API key, so a same-host reverse proxy that forwards public traffic to the backend through 127.0.0.1 causes src/dashboardGuard.js to misclassify external requests as local. A remote unauthenticated attacker can access /v1 APIs such as /v1/models and may abuse configured upstream provider credentials through /v1 proxy endpoints depending on enabled providers. This issue is fixed in version 0.5.2.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7