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CVE-2024-40627

CVE-2024-40627 · OpaMiddleware does not filter HTTP OPTIONS requests

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 5.8 · Medium · EPSS 0.6% · Fix available

Published
Updated

Stack: system · python

Affected products and versions

  • fastapi-opa

    Versions
    • < 2.0.1: Affected

    No fix published

  • fastapi-opa PyPI

    Versions
    • 0.1.0
    • 0.1.1
    • 1.0.0
    • 1.0.1
    • 1.1.0
    • 1.2.0
    • 1.2.1
    • 1.3.0
    • 1.3.1
    • 1.3.2
    • 1.3.3
    • 1.3.4
    • 1.3.5
    • 1.3.6
    • 1.3.7
    • 1.4.0
    • 1.4.1
    • 1.4.2
    • 1.4.3
    • 1.4.4
    • 1.4.5
    • 1.4.7
    • 1.4.8
    • 2.0.0
    Affected ranges
    • ECOSYSTEM: < 2.0.1

    Update to 2.0.1

  • fastapi Ubuntu:22.04:LTS

    Versions
    • 0.63.0-2
    • 0.63.0-2ubuntu0.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • fastapi Ubuntu:24.04:LTS

    Versions
    • 0.101.0-1
    • 0.101.0-2
    • 0.101.0-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • fastapi Ubuntu:25.10

    Versions
    • 0.115.11-3
    • 0.115.11-4ubuntu1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • fastapi Ubuntu:26.10

    Versions
    • 0.118.0-1
    • 0.135.3-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • fastapi Ubuntu:26.04:LTS

    Versions
    • 0.115.11-4ubuntu1
    • 0.118.0-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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