CVE-2026-91096 – In proxygen from v2024.10.28.00 until v2026.09.28.00, WebTransportImpl::terminateSessionSt

In proxygen from v2024.10.28.00 until v2026.09.28.00, WebTransportImpl::terminateSessionStreams (WebTransportImpl::destroy in releases before v2025.08.18.00) failed to unregister read callbacks for streams that were no longer open before destroying them. The transport could then invoke a read callback that had been freed.