GHSA-c72g-53hw-82q7 OpenFGA Authorization Bypass

• Go github.com/openfga/openfga: >= 1.8.0, < 1.8.13 → fixed in 1.8.13

Overview OpenFGA v1.8.0 to v1.8.12 ( openfga-0.2.16 <= Helm chart <= openfga-0.2.31, v1.8.0 <= docker <= v.1.8.12) are vulnerable to authorization bypass when certain Check and ListObject calls are executed. Am I Affected? If you are using OpenFGA v1.8.0 to v1.8.12, specifically under the following conditions, you are affected by this authorization bypass vulnerability: • Calling Check API or ListObjects with an authorization model that has a relationship directly assignable by both type bound public access and userset, and • There are check or list object queries with contextual tuples for the relationship that can be directly assignable by both type bound public access and userset, and • Those contextual tuples’s user field is an userset, and • Type bound public access tuples are not assigned to the relationship Fix Upgrade to v1.8.13. This upgrade is backwards compatible. Acknowledgments OpenFGA would like to thank @udyvish for discovering this vulnerability.