<div><img width="300" height="169" src="https://readwrite.com/wp-content/uploads/2026/09/stolen-cards-targeted-polymarket-fraud-attempt-300x169.webp" class="attachment-medium size-medium wp-post-image" alt="Abstract illustration of a stolen payment card blocked by a red-accented fraud control gateway" style="width:100%;height:56.25%;max-width:1200px;margin-bottom: 15px;" decoding="async" fetchpriority="high" srcset="https://readwrite.com/wp-content/uploads/2026/09/stolen-cards-targeted-polymarket-fraud-attempt-300x169.webp 300w, https://readwrite.com/wp-content/uploads/2026/09/stolen-cards-targeted-polymarket-fraud-attempt-900x506.webp 900w, https://readwrite.com/wp-content/uploads/2026/09/stolen-cards-targeted-polymarket-fraud-attempt-260x146.webp 260w, https://readwrite.com/wp-content/uploads/2026/09/stolen-cards-targeted-polymarket-fraud-attempt.webp 1200w" sizes="(max-width: 300px) 100vw, 300px" /></div>
<p>Polymarket's U.S. app was hit by stolen-card fraud, as attackers tried to siphon at least $10 million before controls tightened on the platform.</p>
<p>The post <a href="https://readwrite.com/stolen-card-fraud-polymarket/">Stolen Cards Targeted Polymarket in $10 Million Fraud Attempt</a> appeared first on <a href="https://readwrite.com">ReadWrite</a>.</p>