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

Quick assessment

Affected
decolua 9router
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

decolua 9Router是decolua基金会的一个智能路由与降级的AI模型代理工具。 decolua 9Router 0.4.80之前版本存在授权问题漏洞，该漏洞源于登录速率限制器从攻击者控制的X-Forwarded-For HTTP标头派生客户端身份，导致远程攻击者可旋转该值绕过5次尝试阈值和渐进锁定持续时间，进行无限制的暴力破解尝试。

CVSS 7.3 · High EPSS 0.52% · P42

Affected Version Matrix 1

VendorProduct Version RangeStatus
decolua 9router < 0.4.80 affected
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I. Basic Information for CVE-2026-55501

Vulnerability Information
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Vulnerability Title
9router: Login brute-force protection bypass via spoofed X-Forwarded-For header
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
过多认证尝试的限制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
decolua 9router 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
decolua 9Router是decolua基金会的一个智能路由与降级的AI模型代理工具。 decolua 9Router 0.4.80之前版本存在授权问题漏洞，该漏洞源于登录速率限制器从攻击者控制的X-Forwarded-For HTTP标头派生客户端身份，导致远程攻击者可旋转该值绕过5次尝试阈值和渐进锁定持续时间，进行无限制的暴力破解尝试。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
decolua 9router < 0.4.80 -

II. Public POCs for CVE-2026-55501

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 10030 chars
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In-depth vulnerability mechanism
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Exploit chain & mitigation
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III. Intelligence Information for CVE-2026-55501

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Patches & Fixes for CVE-2026-55501 (1)

Vendor Advisories for CVE-2026-55501 (1)

Other References for CVE-2026-55501 (1)

Same Patch Batch · decolua · 2026-07-10 · 6 CVEs total

CVE-2026-55500 9.9 CRITICAL 9router: Exposure of Sensitive Information and Unprotected Database Import/Export Allows C
CVE-2026-55638 8.6 HIGH 9router: Unauthenticated LLM proxy access via /codex rewrite authorization bypass
CVE-2026-56675 8.3 HIGH 9router: Reverse proxy locality collapse allows unauthenticated access to 9router /v1 APIs
CVE-2026-55641 8.2 HIGH 9router: Unauthenticated `/v1` proxy access via `Host`-header spoofing → open AI relay + S
CVE-2026-56676 7.4 HIGH 9router: Image prefetch DNS rebinding allows SSRF to internal services

IV. Related Vulnerabilities

Same product: 9router
Same vendor: decolua
Same weakness: CWE-307

V. Comments for CVE-2026-55501

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