QlikView 11 SR2 Update 2 was issued today. This update includes a resolution to a security issue discovered in the product. More details on this fix can be found in the release notes. The specific vulnerability relates to multiple users simultaneously logging in to a document while it is being reloaded in memory, and the vulnerability exists only if that document has dynamic section access reduction with a numeric reduction field. The steps to reproduce this vulnerability are therefore complex. As with any security patch we recommend all customers to take this update release. If you are using Section Access, this release should be regarded as a critical upgrade.
This update will also be part of the QlikView 10 SR6 release, due around the end of the year.