Last week Microsoft issued a blog post stating that Internet Explorer will not support WebGL because WebGL is inherently insecure. The post was based on research conducted by the firm Context, which showed that WebGL could be used for denial of service attacks or use the GPU to run malicious code. Microsoft complained that WebGL is too reliant on third parties (ie, GPU vendors) to secure the Web experience.
The only problem, according to Chrome developer Gregg Tavares (not speaking on behalf of Google), is that Silverlight 5 has the exact same vulnerability. Microsoft says it has fixed the vulnerability and the fix will appear in the next beta release.
Article source: RRW http://feedproxy.google.com/~r/readwriteweb/~3/xy2NkXG36RM/developer-silverlight-has-the.php