diff --git a/CHANGELOG.md b/CHANGELOG.md
index 44824d207c409..46949354f6381 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -169,6 +169,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Delegating CachingWeightWrapper#count to internal weight object ([#10543](https://github.com/opensearch-project/OpenSearch/pull/10543))
 - Fix per request latency last phase not tracked ([#10934](https://github.com/opensearch-project/OpenSearch/pull/10934))
 - Fix for stuck update action in a bulk with `retry_on_conflict` property ([#11152](https://github.com/opensearch-project/OpenSearch/issues/11152))
+- Remove shadowJar from `lang-painless` module publication ([#11369](https://github.com/opensearch-project/OpenSearch/issues/11369))
 
 ### Security
 
diff --git a/modules/lang-painless/build.gradle b/modules/lang-painless/build.gradle
index d7af8621c478a..fb51a0bb7f157 100644
--- a/modules/lang-painless/build.gradle
+++ b/modules/lang-painless/build.gradle
@@ -33,7 +33,6 @@ import com.github.jengelman.gradle.plugins.shadow.ShadowBasePlugin
 
 apply plugin: 'opensearch.validate-rest-spec'
 apply plugin: 'opensearch.yaml-rest-test'
-apply plugin: 'com.github.johnrengelman.shadow'
 
 opensearchplugin {
   description 'An easy, safe and fast scripting language for OpenSearch'
@@ -62,30 +61,6 @@ dependencies {
   api project('spi')
 }
 
-test {
-  doFirst {
-    test.classpath -= project.files(project.tasks.named('shadowJar'))
-    test.classpath -= project.configurations.getByName(ShadowBasePlugin.CONFIGURATION_NAME)
-    test.classpath += project.extensions.getByType(SourceSetContainer).getByName(SourceSet.MAIN_SOURCE_SET_NAME).runtimeClasspath
-  }
-}
-
-shadowJar {
-  archiveClassifier.set('')
-  relocate 'org.objectweb', 'org.opensearch.repackage.org.objectweb'
-  dependencies {
-    include(dependency("org.ow2.asm:asm:${versions.asm}"))
-    include(dependency("org.ow2.asm:asm-util:${versions.asm}"))
-    include(dependency("org.ow2.asm:asm-tree:${versions.asm}"))
-    include(dependency("org.ow2.asm:asm-commons:${versions.asm}"))
-    include(dependency("org.ow2.asm:asm-analysis:${versions.asm}"))
-  }
-}
-
-tasks.validateNebulaPom.dependsOn tasks.generatePomFileForShadowPublication
-tasks.validateShadowPom.dependsOn tasks.generatePomFileForNebulaPublication
-tasks.withType(AbstractPublishToMaven)*.dependsOn "generatePomFileForShadowPublication", "generatePomFileForNebulaPublication"
-
 tasks.named("dependencyLicenses").configure {
   mapping from: /asm-.*/, to: 'asm'
 }