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Aug 28, 2026

Avici card balances hit by Solana contract vulnerability affecting 1,685 users

Solana neobank Avici disclosed a vulnerability in its card contract that impacted $500,859 in user balances across 1,685 accounts. The company committed to full refunds.

Aug 28, 2026·4 sources
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Top claims

  • ▪The attacker initiated the August 28, 2026 exploit by calling SubmitSignatures on the authorization program, which invoked Solana's Ed25519 signature-verification precompile
  • ▪On August 28, 2026, an attacker drained card balances from Avici, a Solana-based neobank, affecting 1,685 users
  • ▪After gaining administrator privileges during the August 28, 2026 exploit, the attacker called WithdrawCollateralAsset to withdraw balances from users' collateral accounts

Topics

Smart contractsCrypto paymentsSolanaDeFi

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