CVE-2026-56675
9router: Reverse proxy locality collapse allows unauthenticated access to 9router /v1 APIs
HIGH 8.3EPSS 0.5%
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.
- Affected
- decolua · 9router
- CVSS v3.1 GITHUB
- 8.3 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L - EPSS
- 0.50% chance of exploitation in the next 30 days, 42nd percentile
- Published
- 2026-07-10