CVE-2023-40579: OpenFGA Authorization Bypass

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-08-25 · updated 2026-06-17
Weakness: CWE-284

Description

OpenFGA is an authorization/permission engine built for developers and inspired by Google Zanzibar. Some end users of OpenFGA v1.3.0 or earlier are vulnerable to authorization bypass when calling the ListObjects API. The vulnerability affects customers using `ListObjects` with specific models. The affected models contain expressions of type `rel1 from type1`. This issue has been patched in version 1.3.1.

Affected products

openfga: before 1.3.1 — fixed in 1.3.1

How to fix

Upgrade to a fixed version: openfga 1.3.1. Check the vendor advisory for mitigations.

References

https://github.com/openfga/openfga/releases/tag/v1.3.1
https://github.com/openfga/openfga/security/advisories/GHSA-jcf2-mxr2-gmqp
https://github.com/openfga/openfga/releases/tag/v1.3.1
https://github.com/openfga/openfga/security/advisories/GHSA-jcf2-mxr2-gmqp

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