diff --git a/hibernate-core/src/test/java/org/hibernate/test/idclass/IdClassForNestedIdWithAssociationTest.java b/hibernate-core/src/test/java/org/hibernate/test/idclass/IdClassForNestedIdWithAssociationTest.java
new file mode 100644
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--- /dev/null
+++ b/hibernate-core/src/test/java/org/hibernate/test/idclass/IdClassForNestedIdWithAssociationTest.java
@@ -0,0 +1,196 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * License: GNU Lesser General Public License (LGPL), version 2.1 or later
+ * See the lgpl.txt file in the root directory or http://www.gnu.org/licenses/lgpl-2.1.html
+ */
+package org.hibernate.test.idclass;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.hibernate.test.util.SchemaUtil.getColumnNames;
+
+import java.io.Serializable;
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.persistence.IdClass;
+import javax.persistence.ManyToOne;
+
+import org.hibernate.testing.TestForIssue;
+import org.hibernate.testing.junit4.BaseNonConfigCoreFunctionalTestCase;
+import org.junit.Test;
+
+/**
+ * Test that bootstrap doesn't throw an exception
+ * when an entity has a composite ID containing an association to another entity,
+ * which itself has a composite ID containing an association to another entity.
+ * <p>
+ * This test used to fail on bootstrap with the following error:
+ * <p>
+ * org.hibernate.MappingException: identifier mapping has wrong number of columns: org.hibernate.test.idclass.IdClassForNestedIdWithAssociationTest$NestedIdClassEntity type: component[idClassEntity,key3]
+ * 	at org.hibernate.mapping.RootClass.validate(RootClass.java:273)
+ * 	at org.hibernate.boot.internal.MetadataImpl.validate(MetadataImpl.java:359)
+ * 	at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:307)
+ * 	at org.hibernate.boot.internal.SessionFactoryBuilderImpl.build(SessionFactoryBuilderImpl.java:471)
+ * 	at org.hibernate.testing.junit4.BaseNonConfigCoreFunctionalTestCase.buildResources(BaseNonConfigCoreFunctionalTestCase.java:165)
+ * 	at org.hibernate.testing.junit4.BaseNonConfigCoreFunctionalTestCase.startUp(BaseNonConfigCoreFunctionalTestCase.java:141)
+ * 	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
+ * 	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
+ * 	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
+ * 	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
+ * 	at org.hibernate.testing.junit4.TestClassMetadata.performCallbackInvocation(TestClassMetadata.java:205)
+ */
+@TestForIssue(jiraKey = "HHH-14918")
+public class IdClassForNestedIdWithAssociationTest extends BaseNonConfigCoreFunctionalTestCase {
+
+	@Override
+	protected Class<?>[] getAnnotatedClasses() {
+		return new Class[] { BasicEntity.class, IdClassEntity.class, NestedIdClassEntity.class };
+	}
+
+	@Test
+	public void metadataTest() {
+		assertThat( getColumnNames( "NestedIdClassEntity", metadata() ) )
+				// Just check we're using copied IDs; otherwise the test wouldn't be able to reproduce HHH-14918.
+				.containsExactlyInAnyOrder( "idClassEntity_basicEntity_key1", "idClassEntity_key2", "key3" );
+	}
+
+	// The main goal of the test is to check that bootstrap doesn't throw an exception,
+	// but it feels wrong to have a test class with just an empty test method,
+	// so just check that persisting/loading works correctly.
+	@Test
+	public void smokeTest() {
+		inTransaction( s -> {
+			BasicEntity basic = new BasicEntity( 1L );
+			s.persist( basic );
+			IdClassEntity idClass = new IdClassEntity( basic, 2L );
+			s.persist( idClass );
+			NestedIdClassEntity nestedIdClass = new NestedIdClassEntity( idClass, 3L );
+			s.persist( nestedIdClass );
+		} );
+
+		inTransaction( s -> {
+			NestedIdClassEntity nestedIdClass = s.get(
+					NestedIdClassEntity.class,
+					new NestedIdClassEntity.NestedIdClassEntityId( 1L, 2L, 3L )
+			);
+			assertThat( nestedIdClass )
+					.extracting( NestedIdClassEntity::getKey3 )
+					.isEqualTo( 3L );
+			IdClassEntity idClass = nestedIdClass.getIdClassEntity();
+			assertThat( idClass )
+					.extracting( IdClassEntity::getKey2 )
+					.isEqualTo( 2L );
+			BasicEntity basic = idClass.basicEntity;
+			assertThat( basic )
+					.extracting( BasicEntity::getKey1 )
+					.isEqualTo( 1L );
+		} );
+	}
+
+	@Entity(name = "BasicEntity")
+	public static class BasicEntity {
+		@Id
+		Long key1;
+
+		protected BasicEntity() {
+		}
+
+		public BasicEntity(long key1) {
+			this.key1 = key1;
+		}
+
+		public Long getKey1() {
+			return key1;
+		}
+	}
+
+	@Entity(name = "IdClassEntity")
+	@IdClass(IdClassEntity.IdClassEntityId.class)
+	public static class IdClassEntity {
+		@Id
+		@ManyToOne
+		BasicEntity basicEntity;
+		@Id
+		Long key2;
+
+		protected IdClassEntity() {
+		}
+
+		public IdClassEntity(BasicEntity basicEntity, long key2) {
+			this.basicEntity = basicEntity;
+			this.key2 = key2;
+		}
+
+		public BasicEntity getBasicEntity() {
+			return basicEntity;
+		}
+
+		public Long getKey2() {
+			return key2;
+		}
+
+		public static class IdClassEntityId implements Serializable {
+			long basicEntity;
+			long key2;
+
+			protected IdClassEntityId() {
+			}
+
+			public IdClassEntityId(long basicEntity, long key2) {
+				this.basicEntity = basicEntity;
+				this.key2 = key2;
+			}
+
+			public long getBasicEntity() {
+				return basicEntity;
+			}
+
+			public long getKey2() {
+				return key2;
+			}
+		}
+	}
+
+	@Entity(name = "NestedIdClassEntity")
+	@IdClass(NestedIdClassEntity.NestedIdClassEntityId.class)
+	public static class NestedIdClassEntity {
+		@Id
+		@ManyToOne
+		IdClassEntity idClassEntity;
+		@Id
+		Long key3;
+
+		protected NestedIdClassEntity() {
+		}
+
+		public NestedIdClassEntity(IdClassEntity idClassEntity, long key3) {
+			this.idClassEntity = idClassEntity;
+			this.key3 = key3;
+		}
+
+		public IdClassEntity getIdClassEntity() {
+			return idClassEntity;
+		}
+
+		public Long getKey3() {
+			return key3;
+		}
+
+		public static class NestedIdClassEntityId implements Serializable {
+			IdClassEntity.IdClassEntityId idClassEntity;
+			long key3;
+
+			protected NestedIdClassEntityId() {
+			}
+
+			public NestedIdClassEntityId(IdClassEntity.IdClassEntityId idClassEntity, long key3) {
+				this.idClassEntity = idClassEntity;
+				this.key3 = key3;
+			}
+
+			public NestedIdClassEntityId(long basicEntity, long key2, long key3) {
+				this( new IdClassEntity.IdClassEntityId( basicEntity, key2 ), key3 );
+			}
+		}
+	}
+}