Vulnerability 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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/busykoala/fastapi-opa/blob/6dd6f8c87e908fe080784a74707f016f14
- https://github.com/busykoala/fastapi-opa/commit/9588109ff651f7ffc92687129c495612
- https://github.com/busykoala/fastapi-opa/security/advisories/GHSA-5f5c-8rvc-j8wf
- https://github.com/busykoala/fastapi-opa/blob/6dd6f8c87e908fe080784a74707f016f14
- https://github.com/busykoala/fastapi-opa/commit/9588109ff651f7ffc92687129c495612
- https://github.com/busykoala/fastapi-opa/security/advisories/GHSA-5f5c-8rvc-j8wf
FAQ
What is CVE-2024-40627?
CVE-2024-40627 is a vulnerability with a CVSS score of 5.8 (MEDIUM). 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 dire...
How severe is CVE-2024-40627?
CVE-2024-40627 has been rated MEDIUM with a CVSS base score of 5.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2024-40627?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.