diff --git a/changelog/unreleased/PR#4370-use-own-object-mapper-for-v2api.yml b/changelog/unreleased/PR#4370-use-own-object-mapper-for-v2api.yml
new file mode 100644
index 00000000000..1ad7bbfed3d
--- /dev/null
+++ b/changelog/unreleased/PR#4370-use-own-object-mapper-for-v2api.yml
@@ -0,0 +1,8 @@
+title: using  object-mapper from SolrJacksonMapper for V2Api
+type: fixed
+authors:
+  - name: Renato Haeberli
+
+links:
+  - name: PR#4370
+    url: https://github.com/apache/solr/pull/4370
diff --git a/solr/core/src/java/org/apache/solr/jersey/MessageBodyReaders.java b/solr/core/src/java/org/apache/solr/jersey/MessageBodyReaders.java
index 3a8f60d84e7..a47f0dc6597 100644
--- a/solr/core/src/java/org/apache/solr/jersey/MessageBodyReaders.java
+++ b/solr/core/src/java/org/apache/solr/jersey/MessageBodyReaders.java
@@ -48,7 +48,8 @@ public static class CachingJsonMessageBodyReader extends CachingDelegatingMessag
       implements MessageBodyReader<Object> {
     @Override
     public MessageBodyReader<Object> getDelegate() {
-      return new JacksonJsonProvider().configure(JsonParser.Feature.ALLOW_COMMENTS, true);
+      return new JacksonJsonProvider(SolrJacksonMapper.getObjectMapper())
+          .configure(JsonParser.Feature.ALLOW_COMMENTS, true);
     }
   }
 
diff --git a/solr/core/src/test/org/apache/solr/jersey/PostRequestLoggingFilterTest.java b/solr/core/src/test/org/apache/solr/jersey/PostRequestLoggingFilterTest.java
index 54d44fd80be..c010e3b7829 100644
--- a/solr/core/src/test/org/apache/solr/jersey/PostRequestLoggingFilterTest.java
+++ b/solr/core/src/test/org/apache/solr/jersey/PostRequestLoggingFilterTest.java
@@ -22,10 +22,15 @@
 import static org.mockito.Mockito.when;
 
 import jakarta.ws.rs.container.ContainerRequestContext;
+import jakarta.ws.rs.core.MediaType;
 import jakarta.ws.rs.core.MultivaluedHashMap;
 import jakarta.ws.rs.core.UriInfo;
+import java.io.ByteArrayInputStream;
+import java.lang.annotation.Annotation;
+import java.nio.charset.StandardCharsets;
 import java.util.List;
 import org.apache.solr.SolrTestCaseJ4;
+import org.apache.solr.client.api.model.CreateCollectionRequestBody;
 import org.apache.solr.client.api.model.CreateReplicaRequestBody;
 import org.junit.BeforeClass;
 import org.junit.Test;
@@ -96,6 +101,30 @@ public void testBuildQueryParameterString_ExcludesFilteredParameters() {
     assertEquals("paramName1=paramValue1&paramName2=paramValue2", queryParamStr);
   }
 
+  @Test
+  @SuppressWarnings("unchecked")
+  public void testCachingJsonMessageBodyReaderDelegateUsesConfiguredObjectMapper()
+      throws Exception {
+    final var delegate = new MessageBodyReaders.CachingJsonMessageBodyReader().getDelegate();
+
+    final var entityStream =
+        new ByteArrayInputStream(
+            "{\"name\": \"test\", \"unknownField\": \"someValue\"}"
+                .getBytes(StandardCharsets.UTF_8));
+
+    final var result =
+        (CreateCollectionRequestBody)
+            delegate.readFrom(
+                (Class<Object>) (Class<?>) CreateCollectionRequestBody.class,
+                CreateCollectionRequestBody.class,
+                new Annotation[0],
+                MediaType.APPLICATION_JSON_TYPE,
+                new MultivaluedHashMap<>(),
+                entityStream);
+
+    assertEquals("test", result.name);
+  }
+
   @Test
   public void testRequestBodyStringIsEmptyIfNoRequestBodyFound() {
     // NOTE: no request body is set on the context.