Polymarket, a decentralized prediction market platform, has confirmed a security breach resulting from a vulnerability in a third-party authentication service. The breach led to the theft of funds from some users who registered through Magic Labs, without the need for phishing links or two-factor authentication. The platform has stated that the vulnerability has been addressed and there is no ongoing risk. Affected users will be contacted individually, although the specific amount of loss and the number of impacted users have not been disclosed.