[[release-notes-8.18.2]]
== {es} version 8.18.2

Also see <<breaking-changes-8.18,Breaking changes in 8.18>>.

[[breaking-8.18.2]]
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=== Breaking changes

Snapshot/Restore::
* Make S3 custom query parameter optional {es-pull}128043[#128043]

[[bug-8.18.2]]
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=== Bug fixes

Aggregations::
* Fix a bug in `significant_terms` {es-pull}127975[#127975]

Audit::
* Handle streaming request body in audit log {es-pull}127798[#127798]

Data streams::
* Fix system data streams incorrectly showing up in the list of template validation problems {es-pull}128161[#128161]

Downsampling::
* Downsampling does not consider passthrough fields as dimensions {es-pull}127752[#127752] (issue: {es-issue}125156[#125156])

ES|QL::
* Ensure ordinal builder emit ordinal blocks {es-pull}127949[#127949]
* Fix union types in CCS {es-pull}128111[#128111]

Infra/Core::
* Add missing `outbound_network` entitlement to x-pack-core {es-pull}126992[#126992] (issue: {es-issue}127003[#127003])
* Check hidden frames in entitlements {es-pull}127877[#127877]

Infra/Scripting::
* Avoid nested docs in painless execute api {es-pull}127991[#127991] (issue: {es-issue}41004[#41004])

Logs::
* Fix an authorization error when LogsPatternUsageService attempts to update `logsdb.prior_logs_usage` cluster setting. {es-pull}128050[#128050]

Machine Learning::
* Append all data to Chat Completion buffer {es-pull}127658[#127658]
* Fix services API Google Vertex AI Rerank location field requirement {es-pull}127856[#127856]
* Use internal user for internal inference action {es-pull}128327[#128327]

Relevance::
* Fix: Add `NamedWriteable` for `RuleQueryRankDoc` {es-pull}128153[#128153] (issue: {es-issue}126071[#126071])

Security::
* Remove dangling spaces wherever found {es-pull}127475[#127475]

Snapshot/Restore::
* Add missing entitlement to `repository-azure` {es-pull}128047[#128047] (issue: {es-issue}128046[#128046])

TSDB::
* Skip the validation when retrieving the index mode during reindexing a time series data stream {es-pull}127824[#127824]

[[enhancement-8.18.2]]
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=== Enhancements

Authentication::
* Http proxy support in JWT realm {es-pull}127337[#127337] (issue: {es-issue}114956[#114956])