Palm Pre WebOS 1.1 and earlier processes JavaScript in email messages, which allows remote attackers to execute arbitrary JavaScript, as demonstrated by reading PalmDatabase.db3.
The LunaSysMgr process in Palm Pre WebOS 1.1 and earlier, when not viewing web pages in landscape mode, allows remote attackers to cause a denial of service (crash) via a web page containing a long string following a refresh tag, which triggers a floating point exception.