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Threshold Network Blocks Malicious Attempt to Mint tBTC Without Collateral

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On May 18, 2026, Threshold Network announced that a network upgrade successfully prevented a malicious attempt to mint tBTC without adequate backing. The attempt failed, with no invalid tokens issued and user funds remaining secure. In response to increasing threats, Optimistic Minting has been paused. Minting now operates through a liquidation mechanism, extending the process to 6–7 hours. This change supports the long-term growth and security of the ecosystem.

Odaily Planet Daily reports that Threshold Network posted on X that on May 18, 2026, a malicious actor attempted to mint tBTC without depositing the underlying Bitcoin. The attempt failed, no invalid tBTC was issued, and user funds were never at risk.

As a precaution against frequent malicious activity in the broader crypto ecosystem, Optimistic Minting has been temporarily suspended. Currently, minting operations are conducted through the liquidation mechanism, with typical minting times increasing from approximately 1.5 hours to about 6 to 7 hours.

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