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CVE-2025-46814

CVE-2025-46814 · FastAPI Guard Remote Header Injection via X-Forwarded-For Manipulation

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 3.4 · Low · EPSS 0.3% · Fix available

Published
Updated

Stack: python

Affected products and versions

  • fastapi-guard

    Versions
    • < 2.0.0: Affected

    No fix published

  • fastapi-guard PyPI

    Versions
    • 0.1.0
    • 0.2.0
    • 0.3.2
    • 0.3.3
    • 0.3.4
    • 0.4.0
    • 1.0.0
    • 1.1.0
    • 1.2.0
    • 1.2.1
    • 1.2.2
    • 1.3.2
    • 1.4.0
    • 1.5.0
    Affected ranges
    • ECOSYSTEM: < 2.0.0

    Update to 2.0.0

Original sources

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