CVE-2026-56675 Details
Description
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.
A vulnerability in 9Router prior to version 0.5.2 allows unauthenticated access to /v1 APIs by misclassifying external requests as local. This issue arises because the application trusts loopback requests, especially when forwarded by a same-host reverse proxy like nginx. As a result, requests to the /v1 endpoint can be made without an API key, potentially leading to unauthorized access to sensitive features such as model enumeration and abuse of upstream provider credentials.
Users are advised to update to 9Router version 0.5.2 or later, and to review their reverse proxy configurations to ensure that loopback traffic is not trusted as local.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jul 10, 2026CISA-ADP
Assessed Jul 10, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/decolua/9router/commit/da667836cc7584bea0edd893de1d590c9ea279dc | [email protected] | Source CodeVendor |
| https://github.com/decolua/9router/releases/tag/v0.5.2 | [email protected] | Release NotesVendor |
| https://github.com/decolua/9router/security/advisories/GHSA-x5c9-v98j-722r | [email protected] | AdvisoryExploitRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-287 | Improper Authentication | [email protected] |
| CWE-290 | Authentication Bypass by Spoofing | [email protected] |
| CWE-306 | Missing Authentication for Critical Function | [email protected] |
| CWE-441 | Unintended Proxy or Intermediary ('Confused Deputy') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| decolua 9router | <= 0.4.80 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 10, 2026 | New CVE Received | [email protected] |
| Jul 10, 2026 | CVE Modified | CISA-ADP |