CVE-2026-55501 – 9router: Login brute-force protection bypass via spoofed X-Forwarded-For header

CVE ID :CVE-2026-55501

Published : July 10, 2026, 3:23 p.m. | 25 minutes ago

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.

Severity: 0.0 | NA

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