loona is an experimental, HTTP/1.1 and HTTP/2 implementation in Rust on top of io-uring. loona-hpack suffers from the same vulnerability as the original hpack as documented in issue #11. All users who try to decode untrusted input using the Decoder are vulnerable to this exploit. This issue has been addressed in release version 0.4.3. All users are advised to upgrade. There are no known workarounds for this vulnerability.
The product does not handle or incorrectly handles an exceptional condition.