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breach watch Checkpoint Research June 29, 2026

29th June – Threat Intelligence Report

AI Summary

For the latest discoveries in cyber research for the week of 29th June, please download our Threat Intelligence Bulletin. TOP ATTACKS AND BREACHES Polymarket, a large cryptocurrency-based prediction market, has confirmed a supply chain attack after a third-party frontend vendor breach led to malicious JavaScript being injected into its website. Attackers tricked users into approving fraudulent transactions, stealing about $3 million from fewer than 15 accounts, while the backend remained unaffec

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