diff --git a/src/Http/Controllers/GlideController.php b/src/Http/Controllers/GlideController.php
index 655fd4fa2fb..c1fbfc6238a 100644
--- a/src/Http/Controllers/GlideController.php
+++ b/src/Http/Controllers/GlideController.php
@@ -187,7 +187,7 @@ private function generateBy($type, $item, ?array $params = null)
         $method = 'generateBy'.ucfirst($type);
 
         try {
-            return $this->generator->$method($item, $params ?? $this->request->all());
+            return $this->generator->$method($item, $params ?? $this->request->query->all());
         } catch (InvalidRemoteUrlException $e) {
             abort(400, $e->getMessage());
         } catch (UnableToReadFile $e) {
diff --git a/tests/Feature/Imaging/GlideControllerTest.php b/tests/Feature/Imaging/GlideControllerTest.php
new file mode 100644
index 00000000000..5cda4931238
--- /dev/null
+++ b/tests/Feature/Imaging/GlideControllerTest.php
@@ -0,0 +1,80 @@
+<?php
+
+namespace Tests\Feature\Imaging;
+
+use League\Glide\Signatures\SignatureFactory;
+use PHPUnit\Framework\Attributes\Test;
+use Statamic\Facades\Config;
+use Statamic\Imaging\ImageGenerator;
+use Tests\TestCase;
+
+class GlideControllerTest extends TestCase
+{
+    private $generatedParams;
+
+    public function setUp(): void
+    {
+        parent::setUp();
+
+        config(['statamic.assets.image_manipulation.secure' => true]);
+
+        $this->generatedParams = null;
+
+        $this->mock(ImageGenerator::class, function ($mock) {
+            $mock->shouldReceive('generateByPath')->andReturnUsing(function ($path, $params) {
+                $this->generatedParams = $params;
+
+                return 'foo.jpg';
+            });
+        });
+    }
+
+    private function signedParams(array $params)
+    {
+        return SignatureFactory::create(Config::getAppKey())->addSignature('/img/foo.jpg', $params);
+    }
+
+    #[Test]
+    public function it_uses_the_signed_query_params()
+    {
+        $params = $this->signedParams(['w' => '100']);
+
+        $this->get('/img/foo.jpg?'.http_build_query($params));
+
+        $this->assertEquals($params, $this->generatedParams);
+    }
+
+    #[Test]
+    public function it_rejects_an_invalid_signature()
+    {
+        $this->get('/img/foo.jpg?w=100&s=invalid')->assertStatus(400);
+
+        $this->assertNull($this->generatedParams);
+    }
+
+    #[Test]
+    public function json_body_cannot_override_signed_params()
+    {
+        $params = $this->signedParams(['w' => '100']);
+
+        $this->call('GET', '/img/foo.jpg', $params, [], [], [
+            'CONTENT_TYPE' => 'application/json',
+        ], json_encode(['w' => '9999', 'mark' => 'asset::foo']));
+
+        $this->assertEquals($params, $this->generatedParams);
+    }
+
+    #[Test]
+    public function method_spoofed_form_body_cannot_override_signed_params()
+    {
+        $params = $this->signedParams(['w' => '100']);
+
+        $this->call('POST', '/img/foo.jpg?'.http_build_query($params), [
+            '_method' => 'GET',
+            'w' => '9999',
+            'mark' => 'asset::foo',
+        ]);
+
+        $this->assertEquals($params, $this->generatedParams);
+    }
+}