diff --git a/apps/files_external/lib/Lib/ApplicableHelper.php b/apps/files_external/lib/Lib/ApplicableHelper.php
index 1c603ec2c647b..9b61a3e7f8611 100644
--- a/apps/files_external/lib/Lib/ApplicableHelper.php
+++ b/apps/files_external/lib/Lib/ApplicableHelper.php
@@ -51,12 +51,12 @@ public function isApplicableForUser(StorageConfig $storage, IUser $user): bool {
 		if (count($storage->getApplicableUsers()) + count($storage->getApplicableGroups()) === 0) {
 			return true;
 		}
-		if (in_array($user->getUID(), $storage->getApplicableUsers())) {
+		if (in_array($user->getUID(), $storage->getApplicableUsers(), true)) {
 			return true;
 		}
 		$groupIds = $this->groupManager->getUserGroupIds($user);
 		foreach ($groupIds as $groupId) {
-			if (in_array($groupId, $storage->getApplicableGroups())) {
+			if (in_array($groupId, $storage->getApplicableGroups(), true)) {
 				return true;
 			}
 		}
diff --git a/lib/private/GlobalScale/Config.php b/lib/private/GlobalScale/Config.php
index be35487f3c314..6edd0442f4843 100644
--- a/lib/private/GlobalScale/Config.php
+++ b/lib/private/GlobalScale/Config.php
@@ -52,7 +52,7 @@ public function isSecondary(): bool {
 
 	#[Override]
 	public function isPrimaryAdmin(string $userId): bool {
-		return in_array($userId, $this->config->getSystemValue('gss.master.admin', []))
-			|| in_array($userId, $this->config->getSystemValue('gss.primary.admin', []));
+		return in_array($userId, $this->config->getSystemValue('gss.master.admin', []), true)
+			|| in_array($userId, $this->config->getSystemValue('gss.primary.admin', []), true);
 	}
 }
diff --git a/lib/private/TaskProcessing/Manager.php b/lib/private/TaskProcessing/Manager.php
index af6b016192ef1..e2d85cd676490 100644
--- a/lib/private/TaskProcessing/Manager.php
+++ b/lib/private/TaskProcessing/Manager.php
@@ -1649,7 +1649,7 @@ private function validateUserAccessToFile(mixed $fileId, ?string $userId): void
 		}
 		$mounts = $this->userMountCache->getMountsForFileId($fileId);
 		$userIds = array_map(fn ($mount) => $mount->getUser()->getUID(), $mounts);
-		if (!in_array($userId, $userIds)) {
+		if (!in_array($userId, $userIds, true)) {
 			throw new UnauthorizedException('User ' . $userId . ' does not have access to file ' . $fileId);
 		}
 	}