CVE-2025-46814

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 v3 3.4 LOW

3.4^/10

CVSS v3 : LOW

Vector :

Exploitability : 1.6 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/rennf93/fastapi-guard/commit/0b003fda4c678c1b514e95f319aee88113e9bf4b	Patch
https://github.com/rennf93/fastapi-guard/security/advisories/GHSA-77q8-qmj7-x7pp	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:fastapi-guard:fastapi_guard:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2025-05-06 15:16

Updated : 2025-12-31 17:03

NVD link : CVE-2025-46814

Mitre link : CVE-2025-46814

CVE.ORG link : CVE-2025-46814

JSON object : View

Products Affected

fastapi-guard

fastapi_guard

CWE

CWE-74

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

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