Java Driver 5.7.0-beta0 (January 16, 2026)

What’s Changed 🚀

New Features

• Add auto-embedding support as part of vector search APIs #1862

Credential Handling

• Handle unexpected end-of-stream errors from KMS #1849
• Encryption client now uses writeConcern majority #1858

Performance Optimizations

• Reuse ConnectionSource to avoid extra server selection #1813

Resource Management

• Implement NettyByteBuf.asReadOnly and improve buffer duplication #1841

Compatibility and Maintenance

• Update DEFAULT_ALLOWED_HOSTS to include *.mongo.com #1843
• Update specifications submodule to latest (tests temporarily disabled) #1851
• Remove unused JsonPoweredCrudTestHelper #1838

Benchmarks and Testing

• Add new prose test coverage for transactions #1824
• Improve GridFSObservableSpec cleanup when unsubscribing #1834
• Support optional nModified field in bulk write responses #1823

Bug Fixes and Stability

• Fix server selection flaky tests and update thresholds #1847
• Fix flaky test related to API version handling (JAVA-6016) #1845
• Remove assertion for verbose result due to SERVER-113344 #1835
• Align log level to warning when removing server from cluster #1853

Documentation and Quality of Life

• Update reactive streams MongoCollection JavaDoc to return empty Publisher instead of null #1840

Infrastructure Improvements

• Evergreen git clone depth set to 1 for faster builds #1851

Verifying artifact signatures

Please refer to https://www.mongodb.com/docs/drivers/java/sync/current/security/validate-signatures/#std-label-java-validate-signatures for the full procedure.

gpg --keyserver hkps://keyserver.ubuntu.com --recv-keys 1a75005e142192223d6a7c3b76e0008d166740a8

Full Changelog: r5.4.0-alpha0...r5.7.0-beta0