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Elasticsearch v9.5.4

Elasticsearch: v9.5.4 Release

Release date:
September 9, 2026
Previous version:
v9.5.3 (released September 1, 2026)
Magnitude:
1,213 Diff Delta
Contributors:
20 total committers
Data confidence:
Commits:
44 impacting commits

44 Commits in this Release

Ordered by the degree to which they evolved the repo in this version.

[9.5] msearch/template parity with msearch: memory bounds, cancellation, metrics (#157642) (#158556)
Authored September 7, 2026
[9.5] Fix LIKE/RLIKE list of patterns on non-indexed keyword and wildcard fields (#158355)
Authored September 3, 2026
Prune changelogs after 9.4.6 release
Authored September 2, 2026
[9.5] Cap min_hash filter params to prevent overflow and OOM (#158297)
Authored September 1, 2026
Fix race condition in SigtermTerminationHandler (#152214) (#158624)
Authored September 7, 2026
[CI] Resolve ml-cpp artifacts via DRA build id (#158568) (#158863)
Authored September 9, 2026
[9.5] Fix for test race (#157621) (#158379)
Authored September 2, 2026
Fixing delete and update by query yaml rest tests (#158587) (#158756)
Authored September 8, 2026
[9.5] Fix incorrect results with COUNT(mv_field) on not indexed numeric/date (#158522)
Authored September 8, 2026
Mute org.elasticsearch.xpack.esql.CsvColumnarIT test {csv-spec:fuse.fuseWithRowLinearAndMultiValueScoreColumn} #158511
Authored September 4, 2026
Mute org.elasticsearch.multiproject.test.CoreWithMultipleProjectsClientYamlTestSuiteIT test {yaml=update_by_query/10_basic/Response for version conflict with conflicts=proceed} #158337
Authored September 2, 2026
Mute org.elasticsearch.script.mustache.MultiSearchTemplateIT testLargeMsearchTemplateDoesNotOom #158428
Authored September 7, 2026
Mute org.elasticsearch.common.logging.DeprecationLoggerTests testMultipleSlowLoggersUseSingleLog4jLogger #158695
Authored September 8, 2026
Mute org.elasticsearch.xpack.stateless.StatelessHollowIndexShardsIT testStressWithRelocationOrObjectStoreFailures #156569
Authored September 3, 2026
Mute org.elasticsearch.xpack.esql.expression.function.scalar.string.ReverseTests testFold {TestCase=<long unicode TEXT>} #158699
Authored September 8, 2026
Mute org.elasticsearch.xpack.esql.expression.function.scalar.string.ReverseTests testFold {TestCase=<long unicode KEYWORD>} #158700
Authored September 8, 2026
Mute org.elasticsearch.snapshots.SnapshotResiliencyTests testConcurrentSnapshotDeleteAndDeleteIndex #158512
Authored September 4, 2026
Mute org.elasticsearch.xpack.stateless.commits.VirtualBatchedCompoundCommitsIT testGetVirtualBatchedCompoundCommitIfPrimaryRelocates #158593
Authored September 5, 2026
Mute org.elasticsearch.common.LocalTimeOffsetTests testOverlap #158343
Authored September 2, 2026
Update knn query automatic pre-filtering to handle exists queries on inference fields (#158296) (#158394)
Authored September 2, 2026
Unmute stats_sample spatial tests on 9.5 (#158460)
Authored September 4, 2026
Mute org.elasticsearch.xpack.stateless.shutdown.SigtermTerminationHandlerTests testShutdownBlockIgnoreOtherRoles #158594
Authored September 5, 2026
Unmute reindex tests implicitly fixed by another PR (#158476) (#158483)
Authored September 3, 2026
ESQL: Return 400 for unresolved MMR query vector (#158301) (#158542)
Authored September 4, 2026
ESQL: Fix and unmute BulkArrowAggregationTest (#158055) (#158487)
Authored September 4, 2026
Install tar in the default Docker image (#158361) (#158447)
Authored September 3, 2026
Unmute more tests in CsvColumnarIT test suite. 0
Authored September 3, 2026
Add changelog for bug fix #158175 (#158280) (#158352)
Authored September 2, 2026
[CI] Exclude mmdb files from test artifacts (#158667) (#158686)
Authored September 7, 2026
Change the XContent serialization order to match 9.1 (#158642) (#158672)
Authored September 7, 2026
Add doc-values fallback for unsigned_long queries (#158545) (#158657)
Authored September 7, 2026
ESQL: Increase ParquetCompressedFormatSpecIT timeout (#158266) (#158288)
Authored September 1, 2026
Unmuting test that was fixed in a backport (#158771)
Authored September 8, 2026
[9.5] ESQL: remove stale columnar test masks (#158543)
Authored September 8, 2026
Fix ESIntegTestCase.assertSameDocIdsOnShards (#158261) (#158295)
Authored September 1, 2026
Bump QueryLoggingTemplateRegistry version (#158294) (#158320)
Authored September 1, 2026
Fix synthetic _id getMax on relocation prewarm (#158537) (#158808)
Authored September 9, 2026
[Doc] Add notes about all privileges (#158141) (#158806)
Authored September 9, 2026
Add security stats to monitoring mapping (#155552) (#155564)
Authored September 1, 2026
Parse inner KNN queries as inner queries, so the context is not lost (#158836) (#158844)
Authored September 9, 2026

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Top Contributors in v9.5.4

eranweiss-elastic
martijnvg
elasticsearchmachine
john-wagster
ywangd
mark-vieira
lukewhiting
masseyke
Mikep86
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