diff --git a/Encoder/CsvEncoder.php b/Encoder/CsvEncoder.php
index 3902b56134e..e2677308195 100644
--- a/Encoder/CsvEncoder.php
+++ b/Encoder/CsvEncoder.php
@@ -72,6 +72,10 @@ public function encode(mixed $data, string $format, array $context = []): string
         } elseif (!$data) {
             $data = [[]];
         } else {
+            if ($data instanceof \Traversable) {
+                // Generators can only be iterated once — convert to array to allow multiple traversals
+                $data = iterator_to_array($data);
+            }
             // Sequential arrays of arrays are considered as collections
             $i = 0;
             foreach ($data as $key => $value) {
diff --git a/Tests/Encoder/CsvEncoderTest.php b/Tests/Encoder/CsvEncoderTest.php
index 048d790b04f..34cc940a7d0 100644
--- a/Tests/Encoder/CsvEncoderTest.php
+++ b/Tests/Encoder/CsvEncoderTest.php
@@ -708,6 +708,30 @@ public function testEndOfLinePassedInConstructor()
         $this->assertSame("foo,bar\r\nhello,test\r\n", $encoder->encode($value, 'csv'));
     }
 
+    /** @dataProvider provideIterable */
+    public function testIterable(mixed $data)
+    {
+        $this->assertEquals(<<<'CSV'
+            foo,bar
+            hello,"hey ho"
+            hi,"let's go"
+
+            CSV, $this->encoder->encode($data, 'csv'));
+    }
+
+    public static function provideIterable()
+    {
+        $data = [
+            ['foo' => 'hello', 'bar' => 'hey ho'],
+            ['foo' => 'hi', 'bar' => 'let\'s go'],
+        ];
+
+        yield 'array' => [$data];
+        yield 'array iterator' => [new \ArrayIterator($data)];
+        yield 'iterator aggregate' => [new \IteratorIterator(new \ArrayIterator($data))];
+        yield 'generator' => [(fn (): \Generator => yield from $data)()];
+    }
+
     /**
      * @group legacy
      */