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CVE-2026-49353— 9Router: Local-Only Access Gate Bypass in 9router via Host Header SpoofING

CVSS 7.5 · High EPSS 0.36% · P28

Possible ATT&CK Techniques 1AI

T1133 · External Remote Services

Affected Version Matrix 1

VendorProductVersion RangeStatus
decolua9router<= 0.4.45affected
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I. Basic Information for CVE-2026-49353

Vulnerability Information
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Vulnerability Title
9Router: Local-Only Access Gate Bypass in 9router via Host Header SpoofING
Source: NVD (National Vulnerability Database)
Vulnerability Description
9Router is an AI router & token saver. In 0.4.45 and earlier, 9Router's src/dashboardGuard.js local-only access gate used Host and Origin headers in isLocalRequest() to protect /api/mcp/*, /api/tunnel/*, and /api/cli-tools/*, allowing header spoofing in reverse proxy or tunnel deployments to reach MCP child process stdin paths.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
使用欺骗进行的认证绕过
Source: NVD (National Vulnerability Database)
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 0.4.45及之前版本存在授权问题漏洞，该漏洞源于src/dashboardGuard.js本地访问网关使用Host和Origin标头进行身份验证，允许在反向代理或隧道部署中标头伪造，从而到达MCP子进程stdin路径。
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

VendorProductAffected VersionsCPESubscribe
decolua9router <= 0.4.45 -

II. Public POCs for CVE-2026-49353

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 8641 chars
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III. Intelligence Information for CVE-2026-49353

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Patches & Fixes for CVE-2026-49353 (2)

Vendor Advisories for CVE-2026-49353 (1)

Vendor Pages for CVE-2026-49353 (1)

Same Patch Batch · decolua · 2026-07-15 · 6 CVEs total

CVE-2026-4633910.0 CRITICAL9Router: Unauthenticated Remote Code Execution via unprotected MCP custom plugin routes
CVE-2026-493529.8 CRITICAL9Router: Hardcoded Default fallback JWT Secret Allows Authentication Bypass
CVE-2026-623128.8 HIGH9Router: Authenticated RCE via Unvalidated MCP Plugin Arguments
CVE-2026-566786.4 MEDIUM9Router: Kiro region injection allows authenticated SSRF with Authorization header forward
CVE-2026-566799Router: Mass assignment in PATCH /api/settings allows authenticated authorization downgra

IV. Related Vulnerabilities

Same product: 9router
Same vendor: decolua
Same weakness: CWE-290

V. Comments for CVE-2026-49353

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