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CVE-2026-4171— CodeGenieApp serverless-express API Endpoint TodoList.ts authorization

Quick assessment

Affected
CodeGenieApp serverless-express
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.

Serverless Express是Code Genie开源的一个在无服务器环境中运行Node.js Web应用的库。 Serverless Express 4.17.1及之前版本存在安全漏洞，该漏洞源于对文件examples/lambda-function-url/packages/api/models/TodoList.ts中参数userId的错误操作，可能导致授权绕过。

CVSS 6.3 · Medium EPSS 0.36% · P28

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts
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I. Basic Information for CVE-2026-4171

Vulnerability Information
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Vulnerability Title
CodeGenieApp serverless-express API Endpoint TodoList.ts authorization
Source: CVE Program / CVE List V5
Vulnerability Description
A security vulnerability has been detected in CodeGenieApp serverless-express up to 4.17.1. Affected by this issue is some unknown functionality of the file examples/lambda-function-url/packages/api/models/TodoList.ts of the component API Endpoint. The manipulation of the argument userId leads to authorization bypass. The attack is possible to be carried out remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
Serverless Express 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Serverless Express是Code Genie开源的一个在无服务器环境中运行Node.js Web应用的库。 Serverless Express 4.17.1及之前版本存在安全漏洞，该漏洞源于对文件examples/lambda-function-url/packages/api/models/TodoList.ts中参数userId的错误操作，可能导致授权绕过。
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
CodeGenieApp serverless-express 4.17.0 -

II. Public POCs for CVE-2026-4171

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III. Intelligence Information for CVE-2026-4171

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Vendor Advisories for CVE-2026-4171 (3)

Other References for CVE-2026-4171 (1)

IV. Related Vulnerabilities

Same product: serverless-express
Same vendor: CodeGenieApp
Same weakness: CWE-639

V. Comments for CVE-2026-4171

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