diff --git a/Jenkinsfile b/Jenkinsfile
index 2120dd59f9..d04b9f8e06 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -10,7 +10,7 @@ pipeline {
 	}
 	tools {
 		maven 'apache-maven-latest'
-		jdk 'openjdk-jdk25-latest'
+		jdk 'openjdk-jdk26-latest'
 	}
 	environment {
 		NON_MODULAR_JAVA_HOME = tool(type:'jdk', name:'temurin-jdk8-latest')
@@ -21,7 +21,7 @@ pipeline {
 				xvnc(useXauthority: true) {
 					sh """
 					mvn clean verify --batch-mode --fail-at-end -Dmaven.repo.local=$WORKSPACE/.m2/repository \
-						-Ptest-on-javase-25 -Pbree-libs -Papi-check -Pjavadoc\
+						-Ptest-on-javase-26 -Pbree-libs -Papi-check -Pjavadoc\
 						-Dmaven.test.failure.ignore=true\
 						-Dcompare-version-with-baselines.skip=false \
 						-Dproject.build.sourceEncoding=UTF-8 \
diff --git a/org.eclipse.jdt.debug.tests/META-INF/MANIFEST.MF b/org.eclipse.jdt.debug.tests/META-INF/MANIFEST.MF
index 3dbb3bb7f8..5723e6436e 100644
--- a/org.eclipse.jdt.debug.tests/META-INF/MANIFEST.MF
+++ b/org.eclipse.jdt.debug.tests/META-INF/MANIFEST.MF
@@ -2,7 +2,7 @@ Manifest-Version: 1.0
 Bundle-ManifestVersion: 2
 Bundle-Name: %pluginName
 Bundle-SymbolicName: org.eclipse.jdt.debug.tests; singleton:=true
-Bundle-Version: 3.12.900.qualifier
+Bundle-Version: 3.12.950.qualifier
 Bundle-ClassPath: javadebugtests.jar
 Bundle-Activator: org.eclipse.jdt.debug.testplugin.JavaTestPlugin
 Bundle-Vendor: %providerName
diff --git a/org.eclipse.jdt.debug.tests/build.properties b/org.eclipse.jdt.debug.tests/build.properties
index 9bd1515be6..f4ce19683e 100644
--- a/org.eclipse.jdt.debug.tests/build.properties
+++ b/org.eclipse.jdt.debug.tests/build.properties
@@ -28,7 +28,7 @@ bin.includes = plugin.xml,\
                java16_/,\
                java23/,\
                java24/,\
-               java25/,\
+               java26/,\
                multirelease/
 source.javadebugtests.jar = test plugin/,\
                             tests/,\
diff --git a/org.eclipse.jdt.debug.tests/java25/Main1.java b/org.eclipse.jdt.debug.tests/java26/Main1.java
similarity index 100%
rename from org.eclipse.jdt.debug.tests/java25/Main1.java
rename to org.eclipse.jdt.debug.tests/java26/Main1.java
diff --git a/org.eclipse.jdt.debug.tests/java25/Main2.java b/org.eclipse.jdt.debug.tests/java26/Main2.java
similarity index 100%
rename from org.eclipse.jdt.debug.tests/java25/Main2.java
rename to org.eclipse.jdt.debug.tests/java26/Main2.java
diff --git a/org.eclipse.jdt.debug.tests/pom.xml b/org.eclipse.jdt.debug.tests/pom.xml
index cc0f0a2866..060f936eae 100644
--- a/org.eclipse.jdt.debug.tests/pom.xml
+++ b/org.eclipse.jdt.debug.tests/pom.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
-  Copyright (c) 2012, 2024 Eclipse Foundation and others.
+  Copyright (c) 2012, 2026 Eclipse Foundation and others.
   All rights reserved. This program and the accompanying materials
   are made available under the terms of the Eclipse Distribution License v1.0
   which accompanies this distribution, and is available at
@@ -18,7 +18,7 @@
   </parent>
   <groupId>org.eclipse.jdt</groupId>
   <artifactId>org.eclipse.jdt.debug.tests</artifactId>
-  <version>3.12.900-SNAPSHOT</version>
+  <version>3.12.950-SNAPSHOT</version>
   <packaging>eclipse-test-plugin</packaging>
   <properties>
     <testSuite>${project.artifactId}</testSuite>
@@ -117,5 +117,31 @@
 			</plugins>
 		</build>
 	</profile>
+	<profile>
+		<id>test-on-javase-26</id>
+		<build>
+			<plugins>
+				<plugin>
+					<groupId>org.apache.maven.plugins</groupId>
+					<artifactId>maven-toolchains-plugin</artifactId>
+					<executions>
+						<execution>
+							<phase>validate</phase>
+							<goals>
+								<goal>toolchain</goal>
+							</goals>
+						</execution>
+					</executions>
+					<configuration>
+						<toolchains>
+							<jdk>
+								<id>JavaSE-26</id>
+							</jdk>
+						</toolchains>
+					</configuration>
+				</plugin>
+			</plugins>
+		</build>
+	</profile>
   </profiles>
 </project>
diff --git a/org.eclipse.jdt.debug.tests/test plugin/org/eclipse/jdt/debug/testplugin/JavaProjectHelper.java b/org.eclipse.jdt.debug.tests/test plugin/org/eclipse/jdt/debug/testplugin/JavaProjectHelper.java
index b2d0a42829..2fb711e9c9 100644
--- a/org.eclipse.jdt.debug.tests/test plugin/org/eclipse/jdt/debug/testplugin/JavaProjectHelper.java	
+++ b/org.eclipse.jdt.debug.tests/test plugin/org/eclipse/jdt/debug/testplugin/JavaProjectHelper.java	
@@ -8,6 +8,10 @@
  *
  *  SPDX-License-Identifier: EPL-2.0
  *
+ *  This is an implementation of an early-draft specification developed under the Java
+ *  Community Process (JCP) and is made available for testing and evaluation purposes
+ *  only. The code is not compatible with any specification of the JCP.
+ *
  *  Contributors:
  *     IBM Corporation - initial API and implementation
  *     Jesper S. Møller - bug 422029: [1.8] Enable debug evaluation support for default methods
@@ -69,6 +73,7 @@ public class JavaProjectHelper {
 	public static final String JAVA_SE_23_EE_NAME = "JavaSE-23";
 	public static final String JAVA_SE_24_EE_NAME = "JavaSE-24";
 	public static final String JAVA_SE_25_EE_NAME = "JavaSE-25";
+	public static final String JAVA_SE_26_EE_NAME = "JavaSE-26";
 
 	/**
 	 * path to the test src for 'testprograms'
@@ -112,6 +117,11 @@ public class JavaProjectHelper {
 	 */
 	public static final IPath TEST_25_SRC_DIR = new Path("java25");
 
+	/**
+	 * path to the 26 test source
+	 */
+	public static final IPath TEST_26_SRC_DIR = new Path("java26");
+
 	/**
 	 * path to the multirelease test source
 	 */
@@ -223,6 +233,15 @@ public static boolean isJava25_Compatible() {
 		return isCompatible(25);
 	}
 
+	/**
+	 * Returns if the currently running VM is version compatible with Java 26
+	 *
+	 * @return <code>true</code> if a Java 26 (or greater) VM is running <code>false</code> otherwise
+	 */
+	public static boolean isJava26_Compatible() {
+		return isCompatible(26);
+	}
+
 	/**
 	 * Returns if the current running system is compatible with the given Java minor version
 	 *
diff --git a/org.eclipse.jdt.debug.tests/tests/org/eclipse/jdt/debug/tests/AbstractDebugTest.java b/org.eclipse.jdt.debug.tests/tests/org/eclipse/jdt/debug/tests/AbstractDebugTest.java
index 56d02745ff..1a8001e94c 100644
--- a/org.eclipse.jdt.debug.tests/tests/org/eclipse/jdt/debug/tests/AbstractDebugTest.java
+++ b/org.eclipse.jdt.debug.tests/tests/org/eclipse/jdt/debug/tests/AbstractDebugTest.java
@@ -8,6 +8,10 @@
  *
  * SPDX-License-Identifier: EPL-2.0
  *
+ * This is an implementation of an early-draft specification developed under the Java
+ * Community Process (JCP) and is made available for testing and evaluation purposes
+ * only. The code is not compatible with any specification of the JCP.
+ *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *     Jesper Steen Møller - bug 422029: [1.8] Enable debug evaluation support for default methods
@@ -183,6 +187,7 @@ public abstract class AbstractDebugTest extends TestCase implements  IEvaluation
 	public static final String TWENTYTHREE_PROJECT_NAME = "Two_Three";
 	public static final String TWENTYFOUR_PROJECT_NAME = "Two_Four";
 	public static final String TWENTYFIVE_PROJECT_NAME = "Two_Five";
+	public static final String TWENTYSIX_PROJECT_NAME = "Two_Six";
 	public static final String BOUND_JRE_PROJECT_NAME = "BoundJRE";
 	public static final String MR_PROJECT_NAME = "MR";
 	public static final String CLONE_SUFFIX = "Clone";
@@ -246,6 +251,7 @@ public abstract class AbstractDebugTest extends TestCase implements  IEvaluation
 	private static boolean loaded23 = false;
 	private static boolean loaded24 = false;
 	private static boolean loaded25 = false;
+	private static boolean loaded26 = false;
 	private static boolean loadedEE = false;
 	private static boolean loadedJRE = false;
 	private static boolean loadedMulti = false;
@@ -769,6 +775,36 @@ synchronized void assert25Project() {
 		}
 	}
 
+	synchronized void assert26Project() {
+		IJavaProject jp = null;
+		ArrayList<ILaunchConfiguration> cfgs = new ArrayList<>(1);
+		try {
+			if (!loaded26) {
+				jp = createProject(TWENTYSIX_PROJECT_NAME, JavaProjectHelper.TEST_26_SRC_DIR.toString(), JavaProjectHelper.JAVA_SE_26_EE_NAME, false);
+				jp.setOption(JavaCore.COMPILER_PB_ENABLE_PREVIEW_FEATURES, JavaCore.DISABLED);
+				jp.setOption(JavaCore.COMPILER_SOURCE, JavaCore.VERSION_26);
+				jp.setOption(JavaCore.COMPILER_COMPLIANCE, JavaCore.VERSION_26);
+				jp.setOption(JavaCore.COMPILER_CODEGEN_TARGET_PLATFORM, JavaCore.VERSION_26);
+				cfgs.add(createLaunchConfiguration(jp, "Main1"));
+				cfgs.add(createLaunchConfiguration(jp, "Main2"));
+				loaded26 = true;
+				waitForBuild();
+				assertNoErrorMarkersExist(jp.getProject());
+			}
+		} catch (Exception e) {
+			try {
+				if (jp != null) {
+					jp.getProject().delete(true, true, null);
+					for (int i = 0; i < cfgs.size(); i++) {
+						cfgs.get(i).delete();
+					}
+				}
+			} catch (CoreException ce) {
+				// ignore
+			}
+			handleProjectCreationException(e, TWENTYSIX_PROJECT_NAME, jp);
+		}
+	}
 	/**
 	 * Creates the 'BoundJRE' project used for the JRE testing
 	 */
@@ -1105,6 +1141,16 @@ protected IJavaProject get25Project() {
 		return getJavaProject(TWENTYFIVE_PROJECT_NAME);
 	}
 
+	/**
+	 * Returns the 'Two_Five' project, used for Java 25 tests.
+	 *
+	 * @return the test project
+	 */
+	protected IJavaProject get26Project() {
+		assert26Project();
+		return getJavaProject(TWENTYSIX_PROJECT_NAME);
+	}
+
 	/**
 	 * Returns the 'BoundJRE' project
 	 *
diff --git a/org.eclipse.jdt.debug.tests/tests/org/eclipse/jdt/debug/tests/AutomatedSuite.java b/org.eclipse.jdt.debug.tests/tests/org/eclipse/jdt/debug/tests/AutomatedSuite.java
index e2cbcfb1b5..aacba9e25f 100644
--- a/org.eclipse.jdt.debug.tests/tests/org/eclipse/jdt/debug/tests/AutomatedSuite.java
+++ b/org.eclipse.jdt.debug.tests/tests/org/eclipse/jdt/debug/tests/AutomatedSuite.java
@@ -8,6 +8,10 @@
  *
  * SPDX-License-Identifier: EPL-2.0
  *
+ * This is an implementation of an early-draft specification developed under the Java
+ * Community Process (JCP) and is made available for testing and evaluation purposes
+ * only. The code is not compatible with any specification of the JCP.
+ *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *     SAP SE - Support hyperlinks for stack entries with method signature
@@ -201,7 +205,7 @@ public AutomatedSuite() {
 		addTest(new TestSuite(ConfigurationEncodingTests.class));
 		addTest(new TestSuite(LaunchConfigurationManagerTests.class));
 		addTest(new TestSuite(LaunchConfigurationTests.class));
-		if (JavaProjectHelper.isJava25_Compatible()) {
+		if (JavaProjectHelper.isJava26_Compatible()) {
 			addTest(new TestSuite(InstanceMainMethodsTests.class));
 		}
 		addTest(new TestSuite(ProjectClasspathVariableTests.class));
diff --git a/org.eclipse.jdt.debug.tests/tests/org/eclipse/jdt/debug/tests/core/ModuleOptionsTests.java b/org.eclipse.jdt.debug.tests/tests/org/eclipse/jdt/debug/tests/core/ModuleOptionsTests.java
index dd80bbde6d..0375528aa4 100644
--- a/org.eclipse.jdt.debug.tests/tests/org/eclipse/jdt/debug/tests/core/ModuleOptionsTests.java
+++ b/org.eclipse.jdt.debug.tests/tests/org/eclipse/jdt/debug/tests/core/ModuleOptionsTests.java
@@ -63,6 +63,21 @@ public class ModuleOptionsTests extends AbstractDebugTest {
 			+ "jdk.unsupported.desktop," //
 			+ "jdk.xml.dom";
 
+	private static final String ASSUMED_DEFAULT_MODULES_26_CI_MAC = "java.base," //
+			+ "java.compiler,java.datatransfer,java.desktop,java.instrument,java.logging," //
+			+ "java.management,java.management.rmi,java.naming,java.net.http,java.prefs,java.rmi," //
+			+ "java.scripting,java.security.jgss,java.security.sasl,java.smartcardio," //
+			+ "java.sql,java.sql.rowset,java.transaction.xa,java.xml,java.xml.crypto," //
+			+ "jdk.accessibility,jdk.attach,jdk.compiler,jdk.dynalink,jdk.httpserver," //
+			+ "jdk.incubator.vector,"
+			+ "jdk.jartool,jdk.javadoc,jdk.jconsole,jdk.jdi," //
+			+ "jdk.jfr," //
+			+ "jdk.jshell,jdk.management," //
+			+ "jdk.management.jfr," //
+			+ "jdk.net,jdk.nio.mapmode," //
+			+ "jdk.sctp,jdk.security.auth,jdk.security.jgss,jdk.unsupported," //
+			+ "jdk.unsupported.desktop," //
+			+ "jdk.xml.dom";
 
 	public ModuleOptionsTests(String name) {
 		super(name);
@@ -153,7 +168,7 @@ public void testLimitModules_release9() throws CoreException {
 							+ "jdk.net," //
 							+ "jdk.nio.mapmode," //
 							// + "jdk.packager,jdk.packager.services,jdk.plugin.dom,"
-							// + "jdk.scripting.nashorn," 
+							// + "jdk.scripting.nashorn,"
 							+ "jdk.sctp,"
 							+ "jdk.security.auth,jdk.security.jgss,jdk.unsupported," //
 							+ "jdk.unsupported.desktop,jdk.xml.dom";
@@ -200,6 +215,13 @@ public void testLimitModules1() throws JavaModelException {
 						+ "jdk.unsupported.desktop," //
 						+ "jdk.xml.dom";
 				break;
+			case ASSUMED_DEFAULT_MODULES_26_CI_MAC:
+				expectedModules = "java.instrument,java.net.http,java.scripting,java.smartcardio,java.sql.rowset,java.xml.crypto,"
+						+ "jdk.accessibility," + "jdk.dynalink," + "jdk.httpserver," + "jdk.incubator.vector,"
+						+ "jdk.jartool,jdk.jconsole,jdk.jshell," + "jdk.management.jfr," + "jdk.net," + "jdk.nio.mapmode," + "jdk.sctp,"
+						+ "jdk.security.auth,jdk.security.jgss,jdk.unsupported," + "jdk.unsupported.desktop,"
+						+ "jdk.xml.dom";
+				break;
 			default:
 				fail("Unknown set of default modules " + moduleList);
 				return;
diff --git a/org.eclipse.jdt.debug.tests/tests/org/eclipse/jdt/debug/tests/launching/InstanceMainMethodsTests.java b/org.eclipse.jdt.debug.tests/tests/org/eclipse/jdt/debug/tests/launching/InstanceMainMethodsTests.java
index 98b08523a4..d90741ba88 100644
--- a/org.eclipse.jdt.debug.tests/tests/org/eclipse/jdt/debug/tests/launching/InstanceMainMethodsTests.java
+++ b/org.eclipse.jdt.debug.tests/tests/org/eclipse/jdt/debug/tests/launching/InstanceMainMethodsTests.java
@@ -8,6 +8,10 @@
  *
  * SPDX-License-Identifier: EPL-2.0
  *
+ * This is an implementation of an early-draft specification developed under the Java
+ * Community Process (JCP) and is made available for testing and evaluation purposes
+ * only. The code is not compatible with any specification of the JCP.
+ *
  * Contributors:
  *     Red Hat Inc. - initial implementation
  *******************************************************************************/
@@ -26,7 +30,7 @@ public InstanceMainMethodsTests(String name) {
 
 	@Override
 	protected IJavaProject getProjectContext() {
-		return super.get25Project();
+		return super.get26Project();
 	}
 
 	public void testStaticMainWithoutArgs() throws Exception {
diff --git a/org.eclipse.jdt.launching/launching/org/eclipse/jdt/internal/launching/environments/ExecutionEnvironmentAnalyzer.java b/org.eclipse.jdt.launching/launching/org/eclipse/jdt/internal/launching/environments/ExecutionEnvironmentAnalyzer.java
index 3b73fd87b2..74aa5ad333 100644
--- a/org.eclipse.jdt.launching/launching/org/eclipse/jdt/internal/launching/environments/ExecutionEnvironmentAnalyzer.java
+++ b/org.eclipse.jdt.launching/launching/org/eclipse/jdt/internal/launching/environments/ExecutionEnvironmentAnalyzer.java
@@ -8,6 +8,10 @@
  *
  * SPDX-License-Identifier: EPL-2.0
  *
+ * This is an implementation of an early-draft specification developed under the Java
+ * Community Process (JCP) and is made available for testing and evaluation purposes
+ * only. The code is not compatible with any specification of the JCP.
+ *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *
@@ -100,7 +104,7 @@ public class ExecutionEnvironmentAnalyzer implements IExecutionEnvironmentAnalyz
 		mappings.put(JavaSE_1_8, new String[] { JavaSE_1_7 });
 		mappings.put(JavaSE_9, new String[] { JavaSE_1_8 });
 		mappings.put(JavaSE_10, new String[] { JavaSE_9 });
-		mappings.put(JavaSE_10_Plus, new String[] { JavaSE_25 });
+		mappings.put(JavaSE_10_Plus, new String[] { JavaSE_26 });
 		mappings.put(JavaSE_11, new String[] { JavaSE_10 });
 		mappings.put(JavaSE_12, new String[] { JavaSE_11 });
 		mappings.put(JavaSE_13, new String[] { JavaSE_12 });