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Polymarket Breach Exposes User Accounts Due to Third-Party Vulnerability

Polymarket Breach Exposes User Accounts Due to Third-Party Vulnerability

First seen 25 Dec 2025, 09:08 UTC • •

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ThreatCluster AI
ThreatCluster •March 12, 2026 at 13:27 UTC

Polymarket experienced a security breach affecting user accounts due to a flaw in a third-party authentication provider. Multiple users reported drained accounts, prompting the platform to address the issue. The incident has raised questions about the security of external login and wallet providers in the Web3 space.

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