You're misinformed about webOS like most people. Just like Android, it's based on a Linux kernel. But unlike Android, it's not malware-infested. The apps are made in HTML5, like Win8 is about to do and BlackBerry has said they would do, or can be code natively using Objective C, like iOS. Are you saying Microsoft and Rim are about to put their users in danger of malware because they are about to use HTML5?
Google webOS and security. Doesn't have more holes than other platforms, last time I checked. And with open code, the community can find out holes much faster.