Security· ★★★· bearish·

Hacker Drains 0.75 BTC From Ark Operator Second in Bark Exploit

  • —Attack occurred 5 October, disclosed 8 October; loss was 0.75 BTC (~$62,000)
  • —A boarding-flow bug let the attacker register boards with only their own signatures and double-spend the same coins
  • —The loss hit the server's operational liquidity, not user balances
  • —The attacker also tried to use bitcoin linked to the 19 September Blink Wallet breach, but the attempt failed
Why it matters: The first mainnet exploit of an Ark operator tests the model's core promise: user coins stay safe, but operator liquidity and uptime remain exposed.
#BTC
Source: The Bitcoin Manual
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