CVE-2026-55638 Details
Description
9Router is an AI router & token saver. Prior to 0.5.2, 9router protects /v1, /v1beta, /api/v1, and /api/v1beta in src/dashboardGuard.js but omits /codex before next.config.mjs rewrites /codex/* to /api/v1/responses. A remote unauthenticated attacker can send requests to /codex/* to bypass the API-key gate and cause the server to make upstream provider calls using operator-stored LLM provider credentials. This issue is fixed in version 0.5.2.
A vulnerability in 9Router versions prior to 0.5.2 allows remote, unauthenticated access to the application's LLM proxy. The issue arises because the middleware responsible for API key authorization does not protect the '/codex' endpoint, which is left open for unauthorized use. Exploiting this vulnerability enables attackers to access the LLM proxy using the operator's stored provider credentials, potentially leading to unauthorized consumption of provider credits and unexpected billing impacts.
Users can upgrade to 9Router version 0.5.2 or later to address this vulnerability.
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/security/advisories/GHSA-8gmq-j984-vp4r | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/decolua/9router/commit/b282f0554972ea35281520738759d76abcd0b0b3 | [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-8gmq-j984-vp4r | [email protected] | AdvisoryExploitRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-862 | Missing Authorization | [email protected] |
| CWE-863 | Incorrect Authorization | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| decolua 9router | <= 0.4.80 (semver) |
CPE
Remediation
| |
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 |