OpenFGA is an authorization/permission engine. Versions prior to version 0.2.4 are vulnerable to authorization bypass under certain conditions. Users whose model has a relation defined as a tupleset (the right hand side of a ‘from’ statement) that involves anything other than a direct relationship (e.g. ‘as self’) are vulnerable. Version 0.2.4 contains a patch for this issue.

Affected: Go: github.com/openfga/openfga

### Overview During our internal security assessment, it was discovered that OpenFGA versions `v0.2.3` and prior are vulnerable to authorization bypass under certain conditions.

### Am I Affected? You are affected by this vulnerability if you are using `openfga/openfga` version `v0.2.3` or prior, and your model has a relation defined as a tupleset (the right hand side of a ‘from’ statement) that involves anything other than a direct relationship (e.g. ‘as self’)

### How to fix that? Upgrade to version `v0.2.4`.

### Backward Compatibility This update is not backward compatible. Any model involving rewritten tupleset relations will no longer be acceptable and has to be modified.