v6.9.1

6.9.1 (2025-03-06)

The MongoDB Node.js team is pleased to announce version 6.9.1 of the bson package!

Release Notes

⚠️ Fixed potential data corruption bug when useBigInt64 is enabled

After refactoring to improve deserialization performance in #649, we inadvertently introduced a bug that manifested when deserializing Long values with the useBigInt64 flag enabled. The bug would lead to negative Long values being deserialized as unsigned integers. This issue has been resolved here.

Thanks to @rkistner for reporting this bug!

Bug Fixes

• NODE-6830: incorrect negative bigint handling (#752) (#776) (b13d730)

Documentation

• API
• Changelog

We invite you to try the bson library immediately, and report any issues to the NODE project.