People tend to cite heartbleed as an example of how "open source" has no intrinsic security value. While I agree that something being "open source" does not automatically make it secure, I think that it does allow us to gauge the security of the project.

In the case of heartbleed, anyone who has ever spent more than 30 seconds looking at OpenSSL can tell you that it is not secure software and never will be. We can't identify and remedy every possible vulnerability, but we do have enough information to know that events like heartbleed will happen again and again.