Sourced from mongoose's releases.

8.19.0 / 2025-10-02

• feat: upgrade mongodb driver to 6.20.0 #15651 #15656
• feat(model): add virtuals option to Model.hydrate() to set virtuals #15638 #15627
• fix(schema): handle casting array filters underneath maps of Mixed #15655 #15653
• types: optimize InferRawDocType #15588 ssalbdivad
• types(schema): add lean schema option to TypeScript types #15646 #15583 #10090

Sourced from mongoose's changelog.

8.19.0 / 2025-10-02

• feat: upgrade mongodb driver to 6.20.0 #15651 #15656
• feat(model): add virtuals option to Model.hydrate() to set virtuals #15638 #15627
• fix(schema): handle casting array filters underneath maps of Mixed #15655 #15653
• types: optimize InferRawDocType #15588 ssalbdivad
• types(schema): add lean schema option to TypeScript types #15646 #15583 #10090

• 31c691c chore: release 8.19.0
• 2987cb0 Merge pull request #15654 from Automattic/8.19
• 7fe28f0 Merge pull request #15655 from Automattic/vkarpov15/gh-15653
• 21582f5 fix(schema): handle casting array filters underneath maps of Mixed
• f80f8e5 style: fix lint
• 3327527 refactor: make query option assignment more readable
• c7badea Update test/types/lean.test.ts
• a67d180 Merge pull request #15651 from Automattic/vkarpov15/mongodb-6.20
• befe743 types: avoid FlattenMaps on documents to avoid flattening MongoClient
• 334aec9 feat: use mongodb 6.20
• Additional commits viewable in compare view

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