As this project is pre 1.0 and in rapid development you can't expect anything to be supported by now.
The table below is just a template by now.
| Version | Supported |
|---|---|
| 5.1.x | ✅ |
| 5.0.x | ❌ |
| 4.0.x | ✅ |
| < 4.0 | ❌ |
In case you find any vulnerability let us know it by creating an issue using the appropriate template.
It is expected that the C++ version of the ion compiler could have a lot of vulnerabilities. That should not matter as the C++ version is temporary for recreating the compiler in ion.