CVE-2026-55501

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

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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 7.3 · High · EPSS 0.4% · Fix available

Published

2026-07-10T15:23:53.709Z

Updated

2026-07-10T16:45:23.879Z

Stack: node

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