Attacker Value
Unknown
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Exploitability
Unknown
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User Interaction
Unknown
Privileges Required
Unknown
Attack Vector
Unknown
0

CVE-2024-40627

Disclosure Date: July 15, 2024
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Description

Fastapi OPA is an opensource fastapi middleware which includes auth flow. HTTP OPTIONS requests are always allowed by OpaMiddleware, even when they lack authentication, and are passed through directly to the application. OpaMiddleware allows all HTTP OPTIONS requests without evaluating it against any policy. If an application provides different responses to HTTP OPTIONS requests based on an entity existing (such as to indicate whether an entity is writable on a system level), an unauthenticated attacker could discover which entities exist within an application. This issue has been addressed in release version 2.0.1. All users are advised to upgrade. There are no known workarounds for this vulnerability.

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CVSS V3 Severity and Metrics
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Impact Score:
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Exploitability Score:
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Vector:
Unknown
Attack Vector (AV):
Unknown
Attack Complexity (AC):
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Privileges Required (PR):
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User Interaction (UI):
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Scope (S):
Unknown
Confidentiality (C):
Unknown
Integrity (I):
Unknown
Availability (A):
Unknown

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Technical Analysis