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.
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Fastapi-Guard | Fastapi Guard | < 2.0.0 |
Related Weaknesses (CWE)
References
- https://github.com/rennf93/fastapi-guard/commit/0b003fda4c678c1b514e95f319aee881Patch
- https://github.com/rennf93/fastapi-guard/security/advisories/GHSA-77q8-qmj7-x7ppExploitVendor Advisory
FAQ
What is CVE-2025-46814?
CVE-2025-46814 is a vulnerability with a CVSS score of 3.4 (LOW). 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 ve...
How severe is CVE-2025-46814?
CVE-2025-46814 has been rated LOW with a CVSS base score of 3.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-46814?
Check the references section above for vendor advisories and patch information. Affected products include: Fastapi-Guard Fastapi Guard.