9router: Login brute-force protection bypass via spoofed X-Forwarded-For header (CVE-2026-55501) | HOL Guard CVE

High · CVSS 7.3CVE-2026-55501GHSA-7CFM-PQRJ-XGQ7

9router: Login brute-force protection bypass via spoofed X-Forwarded-For header

Answer in brief

CVE-2026-55501 records a High severity (CVSS 7.3) vulnerability in 9router: Login brute-force protection bypass via spoofed X-Forwarded-For header. The current sources do not mark it as known exploited. The current feed maps decolua/9router (generic), 9router (npm). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jul 10, 2026Updated Jul 10, 2026Source checked Sep 17, 2026First seen by HOL Jul 6, 2026Material review Jul 10, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.3
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 7.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps decolua/9router (generic), 9router (npm). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
decolua/9routergeneric	< 0.4.80	Not reported
9routernpm	<=0.4.71	0.4.77

Recommended response

Check inventory. Check lockfiles and deployed manifests for decolua/9router, 9router.
Review the reported fix. Update 9router to 0.4.77 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Jul 10, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Jul 10, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Jul 6, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.