Possible attack vectors for a web site scraper

I’ve written a little utility that, given a web site address, goes and gets some metadata from the site. My ultimate goal here is to use this inside a web site that allows users to enter a site, and then this utility goes and gets some information: title, URL, and description.

I’m looking specifically at certain tags within the HTML, and I’m encoding the return data, so I believe I’ll be safe from XSS attacks. However, I wonder if there are any other attack vectors that this leaves me open to.