Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/decolua/9router/commit/b282f0554972ea35281520738759d76abcd0b0
- https://github.com/decolua/9router/releases/tag/v0.5.2
- https://github.com/decolua/9router/security/advisories/GHSA-8gmq-j984-vp4r
- https://github.com/decolua/9router/security/advisories/GHSA-8gmq-j984-vp4r
FAQ
What is CVE-2026-55638?
CVE-2026-55638 is a vulnerability with a CVSS score of 8.6 (HIGH). 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 /ap...
How severe is CVE-2026-55638?
CVE-2026-55638 has been rated HIGH with a CVSS base score of 8.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-55638?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.