ShapeShift FOX Colony contract exploited on Arbitrum via meta-transaction flaw

• The exploit occurred in May 2026 on ShapeShift's FOX Colony EtherRouterCreate3 contract on $ARB

• The attacker bypassed auth controls using arbitrary self-call in executeMetaTransaction and replaced the resolver via delegatecall

• All ERC20 assets held by the contract were drained in the attack

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