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CVE-2026-62312— 9Router: Authenticated RCE via Unvalidated MCP Plugin Arguments

CVSS 8.8 · High EPSS 0.72% · P50

Affected Version Matrix 1

VendorProductVersion RangeStatus
decolua9router< 0.5.2affected
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I. Basic Information for CVE-2026-62312

Vulnerability Information
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Vulnerability Title
9Router: Authenticated RCE via Unvalidated MCP Plugin Arguments
Source: NVD (National Vulnerability Database)
Vulnerability Description
9Router is an AI router & token saver. Prior to 0.5.2, 9Router allows a remote authenticated attacker to achieve arbitrary code execution on the host operating system by combining a Host header bypass of localhost-only routes with unvalidated MCP plugin args passed to child_process.spawn(), allowing malicious custom plugins to execute commands through /api/mcp//sse. This issue is fixed in version 0.5.2.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: NVD (National Vulnerability Database)
Vulnerability Title
decolua 9router 命令注入漏洞
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 0.5.2之前版本存在命令注入漏洞，该漏洞源于Host标头绕过localhost-only路由，且MCP插件参数未经验证就传递给child_process.spawn()，允许远程认证攻击者通过/api/mcp//sse让恶意自定义插件执行命令，从而实现主机操作系统上的任意代码执行。
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 < 0.5.2 -

II. Public POCs for CVE-2026-62312

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 6278 chars
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III. Intelligence Information for CVE-2026-62312

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Patches & Fixes for CVE-2026-62312 (1)

Vendor Advisories for CVE-2026-62312 (1)

Other References for CVE-2026-62312 (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-2026-493537.5 HIGH9Router: Local-Only Access Gate Bypass in 9router via Host Header SpoofING
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-78

V. Comments for CVE-2026-62312

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