CVE-2026-55501
9router: Login brute-force protection bypass via spoofed X-Forwarded-For header
HIGH 7.3EPSS 0.5%
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.
- Affected
- decolua · 9router
- CVSS v3.1 GITHUB
- 7.3 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L - EPSS
- 0.52% chance of exploitation in the next 30 days, 43rd percentile
- Published
- 2026-07-10