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Elasticsearch version 8.18.8

IMPORTANT: This documentation is no longer updated. Refer to Elastic's version policy and the latest documentation.

Elasticsearch version 8.18.8

Also see Breaking changes in 8.18.

The 8.18.8 release contains fixes for potential security vulnerabilities. Please see our security advisory for more details.

Bug fixes

Aggregations

Propagates filter() to aggregation functions' surrogates #134461 (issue: #134380)

ES|QL

Fix async get results with inconsistent headers #135078 (issue: #135042)

Engine

Bypass MMap arena grouping as this has caused issues with too many regions being mapped #135012

Infra/Node Lifecycle

Fix systemd notify to use a shared arena #135235

Ingest Node

Correctly apply field path to JSON processor when adding contents to document root #135479

Machine Learning

Add .reindexed-v7-ml-anomalies-* to anomaly results template index pattern #135270
Gracefully shutdown model deployment when node is removed from assignment routing #134673
Reset health status on successful empty checkpoint #135653 (issue: #135650)

Mapping

Fix for creating semantic_text fields on pre-8.11 indices crashing Elasticsearch #135845

Search

Fix KQL case-sensitivity for keyword fields in ES|QL #135776 (issue: #135772)
Prevent field caps from failing due to can match failure #134134 (issue: #116106)

Transform

Fix a bug in the GET _transform API that incorrectly claims some Transform configurations are missing #134963 (issue: #134263)
Prevent Transform from queuing too many PIT close requests by waiting for PIT to close before finishing the checkpoint #134955 (issue: #134925)

Enhancements

Audit

* Change reindex to use ::es-redacted

filtering #135414

Authorization

[Island Browser] Add manage, create_index, read, index, write, delete, permission for third party agent indices kibana_system #134636 (issue: #134136)

Infra/Plugins

Add Reason field to elastic-agent upgrade details metadata #134711

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