Index: branches/version-2/data/class/pages/products/LC_Page_Products_Detail.php
===================================================================
--- branches/version-2/data/class/pages/products/LC_Page_Products_Detail.php	(revision 17401)
+++ branches/version-2/data/class/pages/products/LC_Page_Products_Detail.php	(revision 17468)
@@ -327,4 +327,10 @@
         }
 
+        // 値の正当性チェック
+        if(!SC_Utils_Ex::sfIsInt($tmp_id)
+                || !$objDb->sfIsRecord("dtb_products", "product_id", $tmp_id, 'del_flg = 0 AND status = 1')) {
+            SC_Utils_Ex::sfDispSiteError(PRODUCT_NOT_FOUND);
+        }
+
         // ログイン判定
         if($objCustomer->isLoginSuccess(true)) {