diff --git a/actionpack/lib/action_view/helpers/tag_helper.rb b/actionpack/lib/action_view/helpers/tag_helper.rb
index 23777721f6..f7afa48256 100644
--- a/actionpack/lib/action_view/helpers/tag_helper.rb
+++ b/actionpack/lib/action_view/helpers/tag_helper.rb
@@ -109,8 +109,12 @@ module ActionView
       #
       #   cdata_section(File.read("hello_world.txt"))
       #   # => <![CDATA[<hello from a text file]]>
+      #
+      #   cdata_section("hello]]>world")
+      #   # => <![CDATA[hello]]]]><![CDATA[>world]]>
       def cdata_section(content)
-        "<![CDATA[#{content}]]>".html_safe
+        splitted = content.gsub(']]>', ']]]]><![CDATA[>')
+        "<![CDATA[#{splitted}]]>".html_safe
       end
 
       # Returns an escaped version of +html+ without affecting existing escaped entities.
diff --git a/actionpack/test/template/tag_helper_test.rb b/actionpack/test/template/tag_helper_test.rb
index 32b33b4a55..7161d107b3 100644
--- a/actionpack/test/template/tag_helper_test.rb
+++ b/actionpack/test/template/tag_helper_test.rb
@@ -91,6 +91,11 @@ class TagHelperTest < ActionView::TestCase
     assert_equal "<![CDATA[<hello world>]]>", cdata_section("<hello world>")
   end
 
+  def test_cdata_section_splitted
+    assert_equal "<![CDATA[hello]]]]><![CDATA[>world]]>", cdata_section("hello]]>world")
+    assert_equal "<![CDATA[hello]]]]><![CDATA[>world]]]]><![CDATA[>again]]>", cdata_section("hello]]>world]]>again")
+  end
+
   def test_escape_once
     assert_equal '1 &lt; 2 &amp; 3', escape_once('1 < 2 &amp; 3')
   end