diff --git a/system/HTTP/CURLRequest.php b/system/HTTP/CURLRequest.php
index 377f51e46006..616ef143fde8 100644
--- a/system/HTTP/CURLRequest.php
+++ b/system/HTTP/CURLRequest.php
@@ -387,6 +387,10 @@ public function send(string $method, string $url)
             $output = substr($output, strpos($output, $breakString) + 4);
         }
 
+        if (strpos($output, 'HTTP/1.1 200 Connection established') === 0) {
+            $output = substr($output, strpos($output, $breakString) + 4);
+        }
+
         // If request and response have Digest
         if (isset($this->config['auth'][2]) && $this->config['auth'][2] === 'digest' && strpos($output, 'WWW-Authenticate: Digest') !== false) {
             $output = substr($output, strpos($output, $breakString) + 4);
diff --git a/tests/system/HTTP/CURLRequestTest.php b/tests/system/HTTP/CURLRequestTest.php
index 92c43cc58461..d90b8847cbb6 100644
--- a/tests/system/HTTP/CURLRequestTest.php
+++ b/tests/system/HTTP/CURLRequestTest.php
@@ -765,6 +765,21 @@ public function testSendContinuedWithManyHeaders()
         $this->assertSame(200, $response->getStatusCode());
     }
 
+    public function testSendProxied()
+    {
+        $request = $this->getRequest([
+            'base_uri' => 'http://www.foo.com/api/v1/',
+            'delay'    => 100,
+        ]);
+
+        $output = "HTTP/1.1 200 Connection established
+Proxy-Agent: Fortinet-Proxy/1.0\x0d\x0a\x0d\x0aHTTP/1.1 200 OK\x0d\x0a\x0d\x0aHi there";
+        $request->setOutput($output);
+
+        $response = $request->get('answer');
+        $this->assertSame('Hi there', $response->getBody());
+    }
+
     /**
      * See: https://github.com/codeigniter4/CodeIgniter4/issues/7394
      */