Vulnerability Description
9Router is an AI router & token saver. Prior to 0.4.80, the dashboard login rate limiter in src/lib/auth/loginLimiter.js derives the client identity from the attacker-controlled X-Forwarded-For HTTP header, and src/app/api/auth/login/route.js uses that spoofable value for checkLock and recordFail. A remote attacker can rotate the X-Forwarded-For value on each login attempt to receive a fresh rate-limit bucket, bypass the 5-attempt threshold and progressive lockout durations, and perform unlimited brute-force attempts against the dashboard password. This issue is fixed in version 0.4.80.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/decolua/9router/commit/7648c3412b403a29f04967c4b4e9725e228791
- https://github.com/decolua/9router/releases/tag/v0.4.80
- https://github.com/decolua/9router/security/advisories/GHSA-7cfm-pqrj-xgq7
- https://github.com/decolua/9router/security/advisories/GHSA-7cfm-pqrj-xgq7
FAQ
What is CVE-2026-55501?
CVE-2026-55501 is a vulnerability with a CVSS score of 7.3 (HIGH). 9Router is an AI router & token saver. Prior to 0.4.80, the dashboard login rate limiter in src/lib/auth/loginLimiter.js derives the client identity from the attacker-controlled X-Forwarded-For HTTP h...
How severe is CVE-2026-55501?
CVE-2026-55501 has been rated HIGH with a CVSS base score of 7.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-55501?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.