diff --git a/CHANGELOG.md b/CHANGELOG.md
index b4c9fb4246f..eedc9d1840e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Release Notes for Craft CMS 5
 
+## Unreleased
+
+- Fixed an error that could occur if an invalid folder ID was passed to `craft\services\Assets::deleteFoldersByIds()`. ([#16147](https://github.com/craftcms/cms/pull/16147))
+- Fixed a SQL error that occurred when creating a new Single section. ([#16145](https://github.com/craftcms/cms/issues/16145))
+- Fixed an RCE vulnerability.
+
 ## 5.5.1.1 - 2024-11-18
 
 - Fixed a PHP error. ([#16142](https://github.com/craftcms/cms/issues/16142))
diff --git a/bootstrap/bootstrap.php b/bootstrap/bootstrap.php
index bc2a5fb15ba..f43726fb304 100644
--- a/bootstrap/bootstrap.php
+++ b/bootstrap/bootstrap.php
@@ -27,8 +27,15 @@
 // Determine the paths
 // -----------------------------------------------------------------------------
 
-$findConfig = function(string $cliName, string $envName) {
-    return App::cliOption($cliName, true) ?? App::env($envName);
+$findConfig = function(string $cliName, string $envName) use ($appType) {
+    if ($appType === 'console') {
+        $value = App::cliOption($cliName, true);
+        if ($value !== null) {
+            return $value;
+        }
+    }
+
+    return App::env($envName);
 };
 
 // Set the vendor path. By default assume that it's 4 levels up from here
@@ -49,11 +56,7 @@
 // Set the environment
 // -----------------------------------------------------------------------------
 
-$environment = App::cliOption('--env', true)
-    ?? App::env('CRAFT_ENVIRONMENT')
-    ?? App::env('ENVIRONMENT')
-    ?? $_SERVER['SERVER_NAME']
-    ?? null;
+$environment = $findConfig('--env', 'CRAFT_ENVIRONMENT') ?? App::env('ENVIRONMENT') ?? $_SERVER['SERVER_NAME'] ?? null;
 
 // Load the general config
 // -----------------------------------------------------------------------------
diff --git a/src/services/Assets.php b/src/services/Assets.php
index 033b43092a1..39728cd6545 100644
--- a/src/services/Assets.php
+++ b/src/services/Assets.php
@@ -312,9 +312,13 @@ public function deleteFoldersByIds(int|array $folderIds, bool $deleteDir = true)
 
         foreach ((array)$folderIds as $folderId) {
             $folder = $this->getFolderById((int)$folderId);
+            if (!$folder) {
+                continue;
+            }
+
             $folders[] = $folder;
 
-            if ($folder && $deleteDir) {
+            if ($folder->path && $deleteDir) {
                 $volume = $folder->getVolume();
                 try {
                     $volume->deleteDirectory($folder->path);
diff --git a/src/services/Entries.php b/src/services/Entries.php
index fdc756a0522..dbeac9218be 100644
--- a/src/services/Entries.php
+++ b/src/services/Entries.php
@@ -43,7 +43,6 @@
 use craft\models\Structure;
 use craft\queue\jobs\ApplyNewPropagationMethod;
 use craft\queue\jobs\ResaveElements;
-use craft\records\Entry as EntryRecord;
 use craft\records\EntryType as EntryTypeRecord;
 use craft\records\Section as SectionRecord;
 use craft\records\Section_SiteSettings as Section_SiteSettingsRecord;
@@ -979,7 +978,7 @@ private function _ensureSingleEntry(Section $section, ?array $siteSettings = nul
         if ($entry === null) {
             $entry = $baseEntryQuery
                 ->trashed(null)
-                ->where([EntryRecord::tableName() . '.[[deletedWithEntryType]]' => 1])
+                ->where(['entries.deletedWithEntryType' => true])
                 ->one();
 
             if ($entry !== null) {