Polymarket Suffers $3 Million Breach via Third-Party Compromise

BTCC / BTCC Square / Global Cryptocurrency /

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2026-06-27 14:29:02

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Polymarket, a predictive markets platform, fell victim to a $3 million exploit after attackers compromised a third-party provider. The breach allowed malicious code injection into the platform's web interface, prompting users to approve fraudulent transactions. At least 11 users were affected.

Blockchain security firm Peckshield confirmed the attack vector as a supply chain compromise—a growing concern in crypto. Unlike protocol-level hacks, this incident targeted front-end infrastructure, bypassing Polymarket's core security measures.

The platform has committed to full reimbursements and severed ties with the vulnerable provider. This breach underscores persistent security challenges as regulators intensify scrutiny of crypto markets.

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