diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index 4fd00173a35f774db8cd97ffb121b8aaf5410fd3..6c2c353eb7b9901ea0f5260fbc4da6117e9a9f13 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -1,7 +1,11 @@
 
-Drupal 6.37-dev, xxxx-xx-xx (development release)
+Drupal 6.38-dev, xxxx-xx-xx (development release)
 ----------------------
 
+Drupal 6.37, 2015-08-19
+-----------------------
+- Fixed security issues (multiple vulnerabilities). See SA-CORE-2015-003.
+
 Drupal 6.36, 2015-06-17
 -----------------------
 - Fixed security issues (OpenID impersonation). See SA-CORE-2015-002.
diff --git a/includes/form.inc b/includes/form.inc
index e9ac8e40fe8eea4ce9de634c58adaad00b5b45d2..b55d724a8d7f9a9e9ab18f6743cab97b3da1780a 100644
--- a/includes/form.inc
+++ b/includes/form.inc
@@ -626,7 +626,7 @@ function drupal_validate_form($form_id, $form, &$form_state) {
   // If the session token was set by drupal_prepare_form(), ensure that it
   // matches the current user's session.
   if (isset($form['#token'])) {
-    if (!drupal_valid_token($form_state['values']['form_token'], $form['#token'])) {
+    if (!drupal_valid_token($form_state['values']['form_token'], $form['#token']) || !empty($form_state['invalid_token'])) {
       // Setting this error will cause the form to fail validation.
       form_set_error('form_token', t('Validation error, please try again. If this error persists, please contact the site administrator.'));
 
@@ -926,12 +926,28 @@ function form_builder($form_id, $form, &$form_state) {
     $form += $info;
   }
 
+  // Special handling if we're on the top level form element.
   if (isset($form['#type']) && $form['#type'] == 'form') {
     $cache = NULL;
     $complete_form = $form;
     if (!empty($form['#programmed'])) {
       $form_state['submitted'] = TRUE;
     }
+    else {
+      // If the session token was set by drupal_prepare_form(), ensure that it
+      // matches the current user's session before processing input.
+      if (isset($form['#token']) && isset($form['#post']) && (isset($form['#post']['form_id']) && $form['#post']['form_id'] == $form_id)) {
+        $form_state['invalid_token'] = FALSE;
+        if (empty($form['#post']['form_token']) || !drupal_valid_token($form['#post']['form_token'], $form['#token'])) {
+          // Setting this error will cause the form to fail validation.
+          form_set_error('form_token', t('Validation error, please try again. If this error persists, please contact the site administrator.'));
+          // This value is checked in _form_builder_handle_input_element().
+          $form_state['invalid_token'] = TRUE;
+          // Make sure file uploads do not get processed.
+          $_FILES = array();
+        }
+      }
+    }
   }
 
   if (isset($form['#input']) && $form['#input']) {
@@ -1019,6 +1035,15 @@ function form_builder($form_id, $form, &$form_state) {
  * attached to a specific element.
  */
 function _form_builder_handle_input_element($form_id, &$form, &$form_state, $complete_form) {
+  static $safe_core_value_callbacks = array(
+    'form_type_token_value',
+    'form_type_textfield_value',
+    'form_type_checkbox_value',
+    'form_type_checkboxes_value',
+    'form_type_password_confirm_value',
+    'form_type_select_value'
+  );
+
   if (!isset($form['#name'])) {
     $name = array_shift($form['#parents']);
     $form['#name'] = $name;
@@ -1051,7 +1076,14 @@ function _form_builder_handle_input_element($form_id, &$form, &$form_state, $com
       if (!$form['#programmed'] || isset($edit)) {
         // Call #type_value to set the form value;
         if (function_exists($function)) {
-          $form['#value'] = $function($form, $edit);
+          // Skip all value callbacks except safe ones like text if the CSRF
+          // token was invalid.
+          if (empty($form_state['invalid_token']) || in_array($function, $safe_core_value_callbacks)) {
+            $form['#value'] = $function($form, $edit);
+          }
+          else {
+            $edit = NULL;
+          }
         }
         if (!isset($form['#value']) && isset($edit)) {
           $form['#value'] = $edit;
@@ -2078,6 +2110,29 @@ function theme_token($element) {
   return theme('hidden', $element);
 }
 
+/**
+ * Process function to prepare autocomplete data.
+ *
+ * @param $element
+ *   A textfield or other element with a #autocomplete_path.
+ *
+ * @return array
+ *   The processed form element.
+ */
+function form_process_autocomplete($element) {
+  $element['#autocomplete_input'] = array();
+  if ($element['#autocomplete_path'] && menu_valid_path(array('link_path' => $element['#autocomplete_path']))) {
+    $element['#autocomplete_input']['#id'] = $element['#id'] .'-autocomplete';
+    // Force autocomplete to use non-clean URLs since this protects against the
+    // browser interpreting the path plus search string as an actual file.
+    $current_clean_url = isset($GLOBALS['conf']['clean_url']) ? $GLOBALS['conf']['clean_url'] : NULL;
+    $GLOBALS['conf']['clean_url'] = 0;
+    $element['#autocomplete_input']['#url_value'] = check_url(url($element['#autocomplete_path'], array('absolute' => TRUE)));
+    $GLOBALS['conf']['clean_url'] = $current_clean_url;
+  }
+  return $element;
+}
+
 /**
  * Format a textfield.
  *
@@ -2096,10 +2151,10 @@ function theme_textfield($element) {
   $extra = '';
   $output = '';
 
-  if ($element['#autocomplete_path'] && menu_valid_path(array('link_path' => $element['#autocomplete_path']))) {
+  if ($element['#autocomplete_path'] && !empty($element['#autocomplete_input'])) {
     drupal_add_js('misc/autocomplete.js');
     $class[] = 'form-autocomplete';
-    $extra =  '<input class="autocomplete" type="hidden" id="'. $element['#id'] .'-autocomplete" value="'. check_url(url($element['#autocomplete_path'], array('absolute' => TRUE))) .'" disabled="disabled" />';
+    $extra =  '<input class="autocomplete" type="hidden" id="'. $element['#autocomplete_input']['#id'] .'" value="'. $element['#autocomplete_input']['#url_value'] .'" disabled="disabled" />';
   }
   _form_set_class($element, $class);
 
diff --git a/includes/menu.inc b/includes/menu.inc
index 0d1ec258e8c2a8f880e329b8ee44826da8bbf30c..ef27d91e7791f958d6fd56416703ed5a004c9469 100644
--- a/includes/menu.inc
+++ b/includes/menu.inc
@@ -1002,7 +1002,7 @@ function menu_tree_collect_node_links(&$tree, &$node_links) {
  */
 function menu_tree_check_access(&$tree, $node_links = array()) {
 
-  if ($node_links) {
+  if ($node_links && (user_access('access content') || user_access('bypass node access'))) {
     // Use db_rewrite_sql to evaluate view access without loading each full node.
     $nids = array_keys($node_links);
     $placeholders = '%d'. str_repeat(', %d', count($nids) - 1);
diff --git a/misc/autocomplete.js b/misc/autocomplete.js
index 8d0dcbe272192d5842c78e78828d5edf5eedeeaf..c5176727c48418305fb42ba089cedb6e653a9c4e 100644
--- a/misc/autocomplete.js
+++ b/misc/autocomplete.js
@@ -253,6 +253,16 @@ Drupal.ACDB.prototype.search = function (searchString) {
   var db = this;
   this.searchString = searchString;
 
+  // See if this string needs to be searched for anyway. The pattern ../ is
+  // stripped since it may be misinterpreted by the browser.
+  searchString = searchString.replace(/^\s+|\.{2,}\/|\s+$/g, '');
+  // Skip empty search strings, or search strings ending with a comma, since
+  // that is the separator between search terms.
+  if (searchString.length <= 0 ||
+    searchString.charAt(searchString.length - 1) == ',') {
+    return;
+  }
+
   // See if this key has been searched for before
   if (this.cache[searchString]) {
     return this.owner.found(this.cache[searchString]);
diff --git a/modules/system/system.module b/modules/system/system.module
index 6ffa529c4c595159c4d1041ba5ae106754b856b4..ccc638fc7afb4e965af0e20f999e85ded8c8ca41 100644
--- a/modules/system/system.module
+++ b/modules/system/system.module
@@ -8,7 +8,7 @@
 /**
  * The current system version.
  */
-define('VERSION', '6.37-dev');
+define('VERSION', '6.38-dev');
 
 /**
  * Core API compatibility.
@@ -169,7 +169,7 @@ function system_elements() {
   $type['submit'] = array('#input' => TRUE, '#name' => 'op', '#button_type' => 'submit', '#executes_submit_callback' => TRUE, '#process' => array('form_expand_ahah'));
   $type['button'] = array('#input' => TRUE, '#name' => 'op', '#button_type' => 'submit', '#executes_submit_callback' => FALSE, '#process' => array('form_expand_ahah'));
   $type['image_button'] = array('#input' => TRUE, '#button_type' => 'submit', '#executes_submit_callback' => TRUE, '#process' => array('form_expand_ahah'), '#return_value' => TRUE, '#has_garbage_value' => TRUE, '#src' => NULL);
-  $type['textfield'] = array('#input' => TRUE, '#size' => 60, '#maxlength' => 128, '#autocomplete_path' => FALSE, '#process' => array('form_expand_ahah'));
+  $type['textfield'] = array('#input' => TRUE, '#size' => 60, '#maxlength' => 128, '#autocomplete_path' => FALSE, '#process' => array('form_process_autocomplete', 'form_expand_ahah'));
   $type['password'] = array('#input' => TRUE, '#size' => 60, '#maxlength' => 128, '#process' => array('form_expand_ahah'));
   $type['password_confirm'] = array('#input' => TRUE, '#process' => array('expand_password_confirm'));
   $type['textarea'] = array('#input' => TRUE, '#cols' => 60, '#rows' => 5, '#resizable' => TRUE, '#process' => array('form_expand_ahah'));