FastAPI Guard Remote Header Injection via X-Forwarded-For Manipulation
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
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| rennf93 | fastapi-guard | affected |
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No data.
No data available yet.
| Source | ID | Title |
|---|---|---|
EUVD |
EUVD-2025-13598 | 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. |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.342% probability within 30 days)
| Type | Values Removed | Values Added |
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| First Time appeared |
Fastapi-guard
Fastapi-guard fastapi Guard |
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| CPEs | cpe:2.3:a:fastapi-guard:fastapi_guard:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Fastapi-guard
Fastapi-guard fastapi Guard |
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| Metrics |
epss
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epss
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| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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| Type | Values Removed | Values Added |
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| 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 |
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| Metrics |
cvssV3_1
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