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Aug 28, 2026

Circle upgrades USDC cross-chain transfers to V2, gives apps 95 days to migrate

Circle has launched Cross-Chain Transfer Protocol V2, reducing USDC transfer times from minutes to seconds, with Aptos among the first to integrate. Legacy V1 applications have until December 1 to migrate before old routes stop working, with burn limits beginning to fall on October 31.

Aug 28, 2026·2 sources
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Jul 4, 2026

White hat hackers discover critical vulnerability in Aptos blockchain that threatened $70 billion in crypto assets

Security researchers from Hexens identified and reported a significant security flaw in the Aptos blockchain using a $3,000 server. The vulnerability has since been patched, preventing potential risk to approximately $70 billion in cryptocurrency.

Jul 4, 2026·1 source
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Top claims

  • ▪Integrating Cross-Chain Transfer Protocol V2 requires developers to point to new contract addresses for TokenMessenger, MessageTransmitter, and TokenMinter.
  • ▪Developers migrating to Cross-Chain Transfer Protocol V2 must replace legacy attestation calls with the /v2/messages/{sourceDomainId} flow.
  • ▪Circle will begin reducing Cross-Chain Transfer Protocol V1 burn limits and transfer capacity on October 31, 2026, before pausing the legacy contracts on December 1, 2026.

Topics

Crypto infrastructureDeFiStablecoinsBlockchain interoperabilityLayer 1sSmart contract platformsCrypto hacks