OpenSearch releases

3.6.0 New feature · 1mo

Notable features

• Pull-based ingestion marked as public API
• Bitmap64 query support
• Index warmer for replica shards

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3.5.0 Breaking risk · 3mo

Notable features

• HTTP/3 (server side) support
• Circuit breaker support for gRPC transport
• Index-level encryption for snapshots and remote-store

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3.4.0 Breaking risk · 5mo

Notable features

• Context-aware segment grouping support
• Dynamic consumer configuration for pull-based ingestion
• Hybrid Cardinality collector optimization

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2.19.4 Breaking risk · 6mo

Notable features

• search.query.max_query_string_length cluster setting

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3.3.2 Bug fix · 7mo

Bug fixes for aggregation casting, timestamp upgrades, and repository settings.

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3.3.1 Bug fix · 7mo

Minor fixes and improvements.

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3.3.0 Breaking risk · 7mo

Notable features

• Rule-based auto-tagging schema with security attributes
• Field collapsing with search_after support
• Streaming aggregations including cardinality

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2.19.3 Maintenance · 9mo

Minor fixes and improvements.

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3.2.0 Breaking risk · 9mo

Notable features

• Enhanced Terms lookup with query clause support
• Hierarchical and ACL-aware routing processors
• Warm Indices Write Block on Flood Watermark

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3.1.0 Breaking risk · 11mo

Breaking changes

• Pull-based ingestion consumer reset Resume API breaking changes for experimental feature

Security fixes

• CVE-2025-27820

Notable features

• Rule-based auto-tagging CRUD APIs
• Derived source feature integration
• Auto Force Merge Manager

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