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6.8HIGH

Polymarket suffers supply chain attack leading to $3 million crypto theft

📅 26 June 2026 at 09:41 UTC📰 Cyber InsiderView original source ↗
Polymarket suffers supply chain attack leading to $3 million crypto theft

Polymarket says it has contained a supply chain attack that injected malicious code into its website after a compromised third-party vendor exposed some users to a phishing campaign. This resulted in roughly $3 million in cryptocurrency theft, which the company says will be fully reimbursed. In a statement posted yesterday on X, Polymarket said it … The post Polymarket suffers supply chain attack leading to $3 million crypto theft appeared first on CyberInsider.

🤖 AI BriefingAuto-generated threat analysis
🔍Threat Overview

Polymarket suffered a supply chain attack resulting in $3 million cryptocurrency theft, with fewer than 15 accounts affected, indicating the attack was largely contained before it spread further.

⚙️Technical Details
Affected Systems
Polymarket's frontend
Attack Vectors
Compromised third-party vendorMalicious script injected into frontend for some users
💥Impact Assessment
Severity: high
Who Is at Risk
Polymarket users who accessed the platform during the incident
🛡️Recommended Actions
1Users should review recent wallet activity for unauthorized transactions and revoke any unnecessary token approvals.
2Polymarket should conduct a thorough investigation into the compromised third-party vendor and implement additional security measures to prevent similar attacks in the future.
3Users should monitor their cryptocurrency balances and be cautious of phishing campaigns
📦Affected Products
Polymarket's frontendPolygon network

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