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.
History

Wed, 31 Dec 2025 17:15:00 +0000

Type Values Removed Values Added
First Time appeared Fastapi-guard
Fastapi-guard fastapi Guard
CPEs cpe:2.3:a:fastapi-guard:fastapi_guard:*:*:*:*:*:*:*:*
Vendors & Products Fastapi-guard
Fastapi-guard fastapi Guard

Sun, 13 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.00085}

epss

{'score': 0.00073}


Tue, 06 May 2025 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 06 May 2025 15:00:00 +0000

Type Values Removed Values Added
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.
Title FastAPI Guard Remote Header Injection via X-Forwarded-For Manipulation
Weaknesses CWE-74
References
Metrics cvssV3_1

{'score': 3.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2025-05-06T19:51:34.278Z

Reserved: 2025-04-30T19:41:58.133Z

Link: CVE-2025-46814

cve-icon Vulnrichment

Updated: 2025-05-06T19:51:20.788Z

cve-icon NVD

Status : Analyzed

Published: 2025-05-06T15:16:02.217

Modified: 2025-12-31T17:03:05.550

Link: CVE-2025-46814

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.