WordPress development team today released newer version of wordpress. Its wordpress 2.6.3. It can be downloaded from wordpress.org. Although this blog is hosted on blogger and not wordpress, my other blog crackedbybinpda.com is running on wordpress. I just updated it from wordpress 2.6.2 to 2.6.3. You should also update wordpress using the usual procedure. Its a security fix and only 2 files are changed. So if you dont like to change the whole wordpress installation you can change these 2 files and your blog is updated. For more information you should refer wordpress development blog or wordpress.org site.
WordPress 2.6.3 available
October 24, 2008