Security· ★★★· bearish·

Ark Protocol Implementation Second Exploited for 0.75 BTC, User Funds Safe

  • —Second lost 0.75 BTC ($62,322) of its own funds in a Monday exploit
  • —A bug let the attacker register boards with only his own signatures and exit them via Lightning
  • —User funds were safe as VTXOs sit on pre-signed exit paths the server cannot spend
  • —The attacker tried to use bitcoin linked to the Sept. 19 Blink Wallet breach but failed
Why it matters: A second Bitcoin project exploit in a week raises fresh security concerns over Ark and Lightning-based L2 infrastructure.
Source: Bitcoin.com