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CVE-2026-49352— 9Router: Hardcoded Default fallback JWT Secret Allows Authentication Bypass

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 0.2.21版本至0.4.44版本存在信任管理问题漏洞，该漏洞源于使用了硬编码的JWT密钥，允许攻击者在JWT_SECRET未设置时伪造auth_token cookie。

CVSS 9.8 · Critical EPSS 0.60% · P49

Affected Version Matrix 1

VendorProduct Version RangeStatus
decolua 9router >= 0.2.21, < 0.4.44 affected
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I. Basic Information for CVE-2026-49352

Vulnerability Information
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Vulnerability Title
9Router: Hardcoded Default fallback JWT Secret Allows Authentication Bypass
Source: CVE Program / CVE List V5
Vulnerability Description
9Router is an AI router & token saver. From 0.2.21 until 0.4.44, 9Router used the hardcoded fallback JWT secret 9router-default-secret-change-me in src/app/api/auth/login/route.js, src/middleware.js, and later src/lib/auth/dashboardSession.js, allowing attackers to forge an auth_token cookie when JWT_SECRET was unset. This issue is fixed in version 0.4.44
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
使用硬编码的凭证
Source: CVE Program / CVE List V5
Vulnerability Title
decolua 9router 信任管理问题漏洞
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 0.2.21版本至0.4.44版本存在信任管理问题漏洞，该漏洞源于使用了硬编码的JWT密钥，允许攻击者在JWT_SECRET未设置时伪造auth_token cookie。
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 >= 0.2.21, < 0.4.44 -

II. Public POCs for CVE-2026-49352

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 13101 chars
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III. Intelligence Information for CVE-2026-49352

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Patches & Fixes for CVE-2026-49352 (1)

Vendor Advisories for CVE-2026-49352 (1)

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

CVE-2026-46339 10.0 CRITICAL 9Router: Unauthenticated Remote Code Execution via unprotected MCP custom plugin routes
CVE-2026-62312 8.8 HIGH 9Router: Authenticated RCE via Unvalidated MCP Plugin Arguments
CVE-2026-49353 7.5 HIGH 9Router: Local-Only Access Gate Bypass in 9router via Host Header SpoofING
CVE-2026-56678 6.4 MEDIUM 9Router: Kiro region injection allows authenticated SSRF with Authorization header forward
CVE-2026-56679 9Router: Mass assignment in PATCH /api/settings allows authenticated authorization downgra

IV. Related Vulnerabilities

Same product: 9router
Same vendor: decolua
Same weakness: CWE-798