diff --git a/src/Symfony/Component/PropertyAccess/PropertyAccessor.php b/src/Symfony/Component/PropertyAccess/PropertyAccessor.php
index df1c16754d..b4347c2009 100644
--- a/src/Symfony/Component/PropertyAccess/PropertyAccessor.php
+++ b/src/Symfony/Component/PropertyAccess/PropertyAccessor.php
@@ -508,7 +508,7 @@ class PropertyAccessor implements PropertyAccessorInterface
      */
     private function getReadAccessInfo($class, $property)
     {
-        $key = (false !== strpos($class, '@') ? rawurlencode($class) : $class).'..'.$property;
+        $key = false !== strpbrk($key = $class.'..'.$property, '{}()/@:') ? rawurlencode($key) : $key;
 
         if (isset($this->readPropertyCache[$key])) {
             return $this->readPropertyCache[$key];
@@ -687,7 +687,7 @@ class PropertyAccessor implements PropertyAccessorInterface
      */
     private function getWriteAccessInfo($class, $property, $value)
     {
-        $key = (false !== strpos($class, '@') ? rawurlencode($class) : $class).'..'.$property;
+        $key = false !== strpbrk($key = $class.'..'.$property, '{}()/@:') ? rawurlencode($key) : $key;
 
         if (isset($this->writePropertyCache[$key])) {
             return $this->writePropertyCache[$key];
@@ -868,7 +868,8 @@ class PropertyAccessor implements PropertyAccessorInterface
         }
 
         if ($this->cacheItemPool) {
-            $item = $this->cacheItemPool->getItem(self::CACHE_PREFIX_PROPERTY_PATH.$propertyPath);
+            $key = false !== strpbrk($propertyPath, '{}()/@:') ? rawurlencode($propertyPath) : $propertyPath;
+            $item = $this->cacheItemPool->getItem(self::CACHE_PREFIX_PROPERTY_PATH.str_replace('\\', '.', $key));
             if ($item->isHit()) {
                 return $this->propertyPathCache[$propertyPath] = $item->get();
             }
diff --git a/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorTest.php b/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorTest.php
index ef60e26dcd..8536a6615e 100644
--- a/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorTest.php
+++ b/src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorTest.php
@@ -582,6 +582,15 @@ class PropertyAccessorTest extends TestCase
         $this->assertEquals('baz', $propertyAccessor->getValue($obj, 'publicGetSetter'));
     }
 
+    public function testAttributeWithSpecialChars()
+    {
+        $obj = new \stdClass();
+        $obj->{'@foo'} = 'bar';
+
+        $propertyAccessor = new PropertyAccessor(false, false, new ArrayAdapter());
+        $this->assertSame('bar', $propertyAccessor->getValue($obj, '@foo'));
+    }
+
     /**
      * @expectedException \Symfony\Component\PropertyAccess\Exception\InvalidArgumentException
      * @expectedExceptionMessage Expected argument of type "Countable", "string" given