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CVE-2026-56679— 9Router: Mass assignment in PATCH /api/settings allows authenticated authorization downgrade

Quick assessment

Affected
decolua 9router
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
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 0.5.4之前版本存在输入验证错误漏洞，该漏洞源于PATCH /api/settings端点将整个请求体写入持久设置而无需字段白名单，允许经过身份验证的用户设置诸如requireLogin等安全关键字段并禁用整个应用的身份验证，将/api/keys和/api/providers等受保护路由暴露给未经身份验证的访问。

AI Predicted 7.3 Difficulty: Easy EPSS 0.52% · P42

Affected Version Matrix 1

VendorProduct Version RangeStatus
decolua 9router < 0.5.4 affected
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I. Basic Information for CVE-2026-56679

Vulnerability Information
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Vulnerability Title
9Router: Mass assignment in PATCH /api/settings allows authenticated authorization downgrade
Source: CVE Program / CVE List V5
Vulnerability Description
9Router is an AI router & token saver. Prior to 0.5.4, the PATCH /api/settings endpoint writes the entire request body to persistent settings without a field whitelist, allowing an authenticated user to set security-critical fields such as requireLogin and disable authentication for the whole application, exposing protected routes such as /api/keys and /api/providers to unauthenticated access. This issue is reported as fixed in version 0.5.4.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-915
Source: CVE Program / CVE List V5
Vulnerability Title
decolua 9router 输入验证错误漏洞
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 0.5.4之前版本存在输入验证错误漏洞，该漏洞源于PATCH /api/settings端点将整个请求体写入持久设置而无需字段白名单，允许经过身份验证的用户设置诸如requireLogin等安全关键字段并禁用整个应用的身份验证，将/api/keys和/api/providers等受保护路由暴露给未经身份验证的访问。
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 < 0.5.4 -

II. Public POCs for CVE-2026-56679

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III. Intelligence Information for CVE-2026-56679

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Vendor Advisories for CVE-2026-56679 (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-2026-49352 9.8 CRITICAL 9Router: Hardcoded Default fallback JWT Secret Allows Authentication Bypass
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

IV. Related Vulnerabilities

Same product: 9router
Same vendor: decolua
Same weakness: CWE-915

V. Comments for CVE-2026-56679

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