MongoDB version 4.2.1 is now available, offering a recommended upgrade for all users of the MongoDB 4.2 series, which includes fixes for various issues such as wildcard index plans missing results and transaction history iterator not returning unowned BSON that may be left dangling. The new version also introduces platform support for Debian 10 x64, Red Hat Enterprise Linux (RHEL) 8 x86, and SUSE 15 builds.