diff --git a/x-pack/plugin/esql/compute/src/main/java/org/elasticsearch/compute/operator/DriverRunner.java b/x-pack/plugin/esql/compute/src/main/java/org/elasticsearch/compute/operator/DriverRunner.java
index c687ce7f864f1..788fc2887ebd9 100644
--- a/x-pack/plugin/esql/compute/src/main/java/org/elasticsearch/compute/operator/DriverRunner.java
+++ b/x-pack/plugin/esql/compute/src/main/java/org/elasticsearch/compute/operator/DriverRunner.java
@@ -9,17 +9,29 @@
 
 import org.elasticsearch.ExceptionsHelper;
 import org.elasticsearch.action.ActionListener;
+import org.elasticsearch.common.util.concurrent.AtomicArray;
 import org.elasticsearch.common.util.concurrent.CountDown;
+import org.elasticsearch.common.util.concurrent.ThreadContext;
 import org.elasticsearch.core.Releasables;
 import org.elasticsearch.tasks.TaskCancelledException;
 
+import java.util.HashMap;
+import java.util.LinkedHashSet;
 import java.util.List;
+import java.util.Map;
+import java.util.Set;
 import java.util.concurrent.atomic.AtomicReference;
 
 /**
  * Run a set of drivers to completion.
  */
 public abstract class DriverRunner {
+    private final ThreadContext threadContext;
+
+    public DriverRunner(ThreadContext threadContext) {
+        this.threadContext = threadContext;
+    }
+
     /**
      * Start a driver.
      */
@@ -30,8 +42,11 @@ public abstract class DriverRunner {
      */
     public void runToCompletion(List<Driver> drivers, ActionListener<Void> listener) {
         AtomicReference<Exception> failure = new AtomicReference<>();
+        AtomicArray<Map<String, List<String>>> responseHeaders = new AtomicArray<>(drivers.size());
         CountDown counter = new CountDown(drivers.size());
-        for (Driver driver : drivers) {
+        for (int i = 0; i < drivers.size(); i++) {
+            Driver driver = drivers.get(i);
+            int driverIndex = i;
             ActionListener<Void> driverListener = new ActionListener<>() {
                 @Override
                 public void onResponse(Void unused) {
@@ -66,7 +81,9 @@ public void onFailure(Exception e) {
                 }
 
                 private void done() {
+                    responseHeaders.setOnce(driverIndex, threadContext.getResponseHeaders());
                     if (counter.countDown()) {
+                        mergeResponseHeaders(responseHeaders);
                         for (Driver d : drivers) {
                             if (d.status().status() == DriverStatus.Status.QUEUED) {
                                 d.close();
@@ -87,4 +104,23 @@ private void done() {
             start(driver, driverListener);
         }
     }
+
+    private void mergeResponseHeaders(AtomicArray<Map<String, List<String>>> responseHeaders) {
+        final Map<String, Set<String>> merged = new HashMap<>();
+        for (int i = 0; i < responseHeaders.length(); i++) {
+            final Map<String, List<String>> resp = responseHeaders.get(i);
+            if (resp == null || resp.isEmpty()) {
+                continue;
+            }
+            for (Map.Entry<String, List<String>> e : resp.entrySet()) {
+                // Use LinkedHashSet to retain the order of the values
+                merged.computeIfAbsent(e.getKey(), k -> new LinkedHashSet<>(e.getValue().size())).addAll(e.getValue());
+            }
+        }
+        for (Map.Entry<String, Set<String>> e : merged.entrySet()) {
+            for (String v : e.getValue()) {
+                threadContext.addResponseHeader(e.getKey(), v);
+            }
+        }
+    }
 }
diff --git a/x-pack/plugin/esql/compute/src/main/java/org/elasticsearch/compute/operator/DriverTaskRunner.java b/x-pack/plugin/esql/compute/src/main/java/org/elasticsearch/compute/operator/DriverTaskRunner.java
index 53d5a66de7b66..221be19cc2871 100644
--- a/x-pack/plugin/esql/compute/src/main/java/org/elasticsearch/compute/operator/DriverTaskRunner.java
+++ b/x-pack/plugin/esql/compute/src/main/java/org/elasticsearch/compute/operator/DriverTaskRunner.java
@@ -42,7 +42,7 @@ public DriverTaskRunner(TransportService transportService, Executor executor) {
     }
 
     public void executeDrivers(Task parentTask, List<Driver> drivers, Executor executor, ActionListener<Void> listener) {
-        var runner = new DriverRunner() {
+        var runner = new DriverRunner(transportService.getThreadPool().getThreadContext()) {
             @Override
             protected void start(Driver driver, ActionListener<Void> driverListener) {
                 transportService.sendChildRequest(
diff --git a/x-pack/plugin/esql/compute/src/test/java/org/elasticsearch/compute/operator/ForkingOperatorTestCase.java b/x-pack/plugin/esql/compute/src/test/java/org/elasticsearch/compute/operator/ForkingOperatorTestCase.java
index 1c12fbf4bcd52..9d1084fcc4cf3 100644
--- a/x-pack/plugin/esql/compute/src/test/java/org/elasticsearch/compute/operator/ForkingOperatorTestCase.java
+++ b/x-pack/plugin/esql/compute/src/test/java/org/elasticsearch/compute/operator/ForkingOperatorTestCase.java
@@ -160,7 +160,7 @@ public final void testManyInitialManyPartialFinalRunner() {
         List<Page> results = new ArrayList<>();
 
         List<Driver> drivers = createDriversForInput(bigArrays, input, results, false /* no throwing ops */);
-        var runner = new DriverRunner() {
+        var runner = new DriverRunner(threadPool.getThreadContext()) {
             @Override
             protected void start(Driver driver, ActionListener<Void> listener) {
                 Driver.start(threadPool.executor(ESQL_TEST_EXECUTOR), driver, between(1, 10000), listener);
@@ -182,7 +182,7 @@ public final void testManyInitialManyPartialFinalRunnerThrowing() {
         List<Page> results = new ArrayList<>();
 
         List<Driver> drivers = createDriversForInput(bigArrays, input, results, true /* one throwing op */);
-        var runner = new DriverRunner() {
+        var runner = new DriverRunner(threadPool.getThreadContext()) {
             @Override
             protected void start(Driver driver, ActionListener<Void> listener) {
                 Driver.start(threadPool.executor(ESQL_TEST_EXECUTOR), driver, between(1, 1000), listener);
diff --git a/x-pack/plugin/esql/compute/src/test/java/org/elasticsearch/compute/operator/OperatorTestCase.java b/x-pack/plugin/esql/compute/src/test/java/org/elasticsearch/compute/operator/OperatorTestCase.java
index 3cbab148e3073..3b2fac5271aa6 100644
--- a/x-pack/plugin/esql/compute/src/test/java/org/elasticsearch/compute/operator/OperatorTestCase.java
+++ b/x-pack/plugin/esql/compute/src/test/java/org/elasticsearch/compute/operator/OperatorTestCase.java
@@ -194,7 +194,7 @@ public static void runDriver(List<Driver> drivers) {
             getTestClass().getSimpleName(),
             new FixedExecutorBuilder(Settings.EMPTY, "esql", numThreads, 1024, "esql", EsExecutors.TaskTrackingConfig.DEFAULT)
         );
-        var driverRunner = new DriverRunner() {
+        var driverRunner = new DriverRunner(threadPool.getThreadContext()) {
             @Override
             protected void start(Driver driver, ActionListener<Void> driverListener) {
                 Driver.start(threadPool.executor("esql"), driver, between(1, 10000), driverListener);
diff --git a/x-pack/plugin/esql/compute/src/test/java/org/elasticsearch/compute/operator/exchange/ExchangeServiceTests.java b/x-pack/plugin/esql/compute/src/test/java/org/elasticsearch/compute/operator/exchange/ExchangeServiceTests.java
index 5b6b33ea0b80a..c94320a9d406a 100644
--- a/x-pack/plugin/esql/compute/src/test/java/org/elasticsearch/compute/operator/exchange/ExchangeServiceTests.java
+++ b/x-pack/plugin/esql/compute/src/test/java/org/elasticsearch/compute/operator/exchange/ExchangeServiceTests.java
@@ -301,7 +301,7 @@ void runConcurrentTest(
             drivers.add(d);
         }
         PlainActionFuture<Void> future = new PlainActionFuture<>();
-        new DriverRunner() {
+        new DriverRunner(threadPool.getThreadContext()) {
             @Override
             protected void start(Driver driver, ActionListener<Void> listener) {
                 Driver.start(threadPool.executor(ESQL_TEST_EXECUTOR), driver, between(1, 10000), listener);
diff --git a/x-pack/plugin/esql/src/internalClusterTest/java/org/elasticsearch/xpack/esql/lookup/EnrichLookupIT.java b/x-pack/plugin/esql/src/internalClusterTest/java/org/elasticsearch/xpack/esql/lookup/EnrichLookupIT.java
index d6611881f8546..fa5a1617e9d61 100644
--- a/x-pack/plugin/esql/src/internalClusterTest/java/org/elasticsearch/xpack/esql/lookup/EnrichLookupIT.java
+++ b/x-pack/plugin/esql/src/internalClusterTest/java/org/elasticsearch/xpack/esql/lookup/EnrichLookupIT.java
@@ -141,7 +141,7 @@ public void testSimple() {
 
         DateFormatter dateFmt = DateFormatter.forPattern("yyyy-MM-dd");
 
-        var runner = new DriverRunner() {
+        var runner = new DriverRunner(transportService.getThreadPool().getThreadContext()) {
             final Executor executor = transportService.getThreadPool().executor(EsqlPlugin.ESQL_THREAD_POOL_NAME);
 
             @Override
diff --git a/x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/CsvTests.java b/x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/CsvTests.java
index 0f1d9257a6c0a..8a5b021addae5 100644
--- a/x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/CsvTests.java
+++ b/x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/CsvTests.java
@@ -378,7 +378,7 @@ private ActualResults executePlan() throws Exception {
                 Randomness.shuffle(drivers);
             }
             // Execute the driver
-            DriverRunner runner = new DriverRunner() {
+            DriverRunner runner = new DriverRunner(threadPool.getThreadContext()) {
                 @Override
                 protected void start(Driver driver, ActionListener<Void> driverListener) {
                     Driver.start(threadPool.executor(ESQL_THREAD_POOL_NAME), driver, between(1, 1000), driverListener);