MongoDB C driver 1.18.0-alpha released

Announcing 1.18.0-alpha of libbson and libmongoc, the libraries constituting the MongoDB C Driver.

This is an unstable prerelease and is unsuitable for production applications.


No changes since 1.17.5; release to keep pace with libmongoc’s version.



  • Introduces support to select an API version when connecting to a MongoDB instance.
  • Supports Azure and Google Cloud Platform as Key Management Service (KMS) providers in Client-Side Field Level Encryption (CSFLE)

Bug fixes:

  • Fixes a possible hang when a limited size client pool is waiting for a client to become available in mongoc_client_pool_pop.


Thanks to everyone who contributed to this release.

  • Kevin Albertson
  • Roberto C. Sánchez
  • Clyde Bazile
  • Andreas Braun
  • Andrew Witten
  • Samantha Ritter
  • Benjamin Rewis
  • Fermín Galán Márquez
  • David Carlier
  • Josh Weinstein
  • Pierre Mickael Gonzalo
  • Richard Donkin
  • Tim Gates
  • David Korczynski