The cassandra crate has not seen a release since December 2016, and its author is unresponsive.
cassandra
The cassandra-cpp crate is a maintained fork:
cassandra-cpp
https://github.com/Metaswitch/cassandra-rs
{ "license": "CC0-1.0" }
{ "affects": { "functions": [], "os": [], "arch": [] }, "affected_functions": null }
null
"https://github.com/rustsec/advisory-db/blob/osv/crates/RUSTSEC-2016-0006.json"
"unmaintained"
[]