Google officially announced that it has "restored the ability to issue new prepaid cards to the Wallet." Additionally, the company "issued a fix that prevents an existing prepaid card from being re-provisioned to another user."
These improvements in the update above come hot on the heels of exploits discovered recently related to Google Wallet. The easiest among them was to clear the app's data under settings; once done, the application was asking for a new PIN but Google prepaid card information was remembered.
Now that you're safe once again, let us know whether you have any doubts in using the offering (knowing that the brute-force method is still present, though requiring root access).
Check out the video below for a full description of the security hole.
[brightcove video="1445301671001" /]