diff --git a/src/Monolog/Formatter/NormalizerFormatter.php b/src/Monolog/Formatter/NormalizerFormatter.php
index 91227241..0d96ed09 100644
--- a/src/Monolog/Formatter/NormalizerFormatter.php
+++ b/src/Monolog/Formatter/NormalizerFormatter.php
@@ -151,9 +151,20 @@ class NormalizerFormatter implements FormatterInterface
             if (isset($frame['file'])) {
                 $data['trace'][] = $frame['file'].':'.$frame['line'];
             } elseif (isset($frame['function']) && $frame['function'] === '{closure}') {
-                // We should again normalize the frames, because it might contain invalid items
+                // Simplify closures handling
                 $data['trace'][] = $frame['function'];
             } else {
+                if (isset($frame['args'])) {
+                    // Make sure that objects present as arguments are not serialized nicely but rather only
+                    // as a class name to avoid any unexpected leak of sensitive information
+                    $frame['args'] = array_map(function ($arg) {
+                        if (is_object($arg) && !($arg instanceof \DateTime || $arg instanceof \DateTimeInterface)) {
+                            return sprintf("[object] (%s)", get_class($arg));
+                        }
+
+                        return $arg;
+                    }, $frame['args']);
+                }
                 // We should again normalize the frames, because it might contain invalid items
                 $data['trace'][] = $this->toJson($this->normalize($frame), true);
             }
diff --git a/tests/Monolog/Formatter/NormalizerFormatterTest.php b/tests/Monolog/Formatter/NormalizerFormatterTest.php
index b4f82897..bafd1c74 100644
--- a/tests/Monolog/Formatter/NormalizerFormatterTest.php
+++ b/tests/Monolog/Formatter/NormalizerFormatterTest.php
@@ -407,6 +407,29 @@ class NormalizerFormatterTest extends \PHPUnit_Framework_TestCase
             $result['context']['exception']['trace'][0]
         );
     }
+
+    public function testExceptionTraceDoesNotLeakCallUserFuncArgs()
+    {
+        try {
+            $arg = new TestInfoLeak;
+            call_user_func(array($this, 'throwHelper'), $arg, $dt = new \DateTime());
+        } catch (\Exception $e) {
+        }
+
+        $formatter = new NormalizerFormatter();
+        $record = array('context' => array('exception' => $e));
+        $result = $formatter->format($record);
+
+        $this->assertSame(
+            '{"function":"throwHelper","class":"Monolog\\\\Formatter\\\\NormalizerFormatterTest","type":"->","args":["[object] (Monolog\\\\Formatter\\\\TestInfoLeak)","'.$dt->format('Y-m-d H:i:s').'"]}',
+            $result['context']['exception']['trace'][0]
+        );
+    }
+
+    private function throwHelper($arg)
+    {
+        throw new \RuntimeException('Thrown');
+    }
 }
 
 class TestFooNorm
@@ -448,3 +471,11 @@ class TestToStringError
         throw new \RuntimeException('Could not convert to string');
     }
 }
+
+class TestInfoLeak
+{
+    public function __toString()
+    {
+        return 'Sensitive information';
+    }
+}