Arbitrary Call Vulnerabilities Lead to $17 Million Loss in SwapNet and Aperture Finance

Arbitrary Call Vulnerabilities Lead to $17 Million Loss in SwapNet and Aperture Finance

First seen 28 Jan 2026, 17:06 UTC •PhemexBinance •78% similarity •46.2

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A security flaw in contracts on Ethereum, Arbitrum, Base, and BSC allowed attackers to exploit arbitrary call capabilities, resulting in a loss of $17 million for SwapNet and Aperture Finance. The vulnerability was reported by BlockSec, which highlighted the exploitation of existing token approvals and the use of transferFrom functionality.

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Aperture Finance SwapNet Arbitrum Base Ethereum BSC