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I. Basic Information for CVE-2025-46814
Vulnerability Information

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Vulnerability Title
FastAPI Guard Remote Header Injection via X-Forwarded-For Manipulation
Source: NVD (National Vulnerability Database)
Vulnerability Description
FastAPI Guard is a security library for FastAPI that provides middleware to control IPs, log requests, and detect penetration attempts. An HTTP header injection vulnerability has been identified in versions prior to 2.0.0. By manipulating the X-Forwarded-For header, an attacker can potentially inject arbitrary IP addresses into the request. This vulnerability can allow attackers to bypass IP-based access controls, mislead logging systems, and impersonate trusted clients. It is especially impactful when the application relies on the X-Forwarded-For header for IP-based authorization or authentication. Users should upgrade to FastAPI Guard version 2.0.0 to receive a fix.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
输出中的特殊元素转义处理不恰当(注入)
Source: NVD (National Vulnerability Database)
Vulnerability Title
fastapi-guard 注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
fastapi-guard是Renzo F个人开发者的一个FastAPI的安全库,提供中间件来控制IP、记录请求和检测渗透尝试。 fastapi-guard 2.0.0之前版本存在注入漏洞,该漏洞源于HTTP标头注入漏洞,可能绕过基于IP的访问控制。
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
rennf93fastapi-guard < 2.0.0 -
II. Public POCs for CVE-2025-46814
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III. Intelligence Information for CVE-2025-46814
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IV. Related Vulnerabilities
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