Vulnerability Description
9Router is an AI router & token saver. Prior to 0.5.6, 9Router deployments that allow requests to reach Next.js without the sanitizing custom-server.js wrapper use the client-supplied X-9r-Real-Ip value as the bucket key in getClientIp, checkLock, and recordFail in src/lib/auth/loginLimiter.js for POST /api/auth/login. A remote unauthenticated attacker can rotate the header on every password guess so each request uses a new failed-attempt bucket and the five-attempt progressive lockout never returns HTTP 429. This permits unthrottled password guessing against the dashboard login and can lead to an administrative session if the password is recovered. This issue is fixed in version 0.5.6.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/decolua/9router/commit/efd20be8d81ef2e256a7037f3aa78e6b567b5f
- https://github.com/decolua/9router/releases/tag/v0.5.6
- https://github.com/decolua/9router/security/advisories/GHSA-32gc-64m7-hj7v
- https://github.com/decolua/9router/security/advisories/GHSA-32gc-64m7-hj7v
FAQ
What is CVE-2026-56682?
CVE-2026-56682 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 9Router is an AI router & token saver. Prior to 0.5.6, 9Router deployments that allow requests to reach Next.js without the sanitizing custom-server.js wrapper use the client-supplied X-9r-Real-Ip val...
How severe is CVE-2026-56682?
CVE-2026-56682 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-56682?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.