CVE-2024-42473: Openfga

Critical severity, CVSS 9.8. EPSS: 0.5% chance of exploitation in the next 30 days.

OpenFGA is an authorization/permission engine. OpenFGA v1.5.7 and v1.5.8 are vulnerable to authorization bypass when calling Check API with a model that uses `but not` and `from` expressions and a userset. Users should downgrade to v1.5.6 as soon as possible. This downgrade is backward compatible. As of time of publication, a patch is not available but OpenFGA's maintainers are planning a patch for inclusion in a future release.

Affected products

• Openfga Openfga: version 1.5.7 only; version 1.5.8 only

Published 2024-08-12. Last modified 2026-06-17.