DISCLOSURE

Preventing Permit2 Approval Phishing Attacks

By Secure Chain X Team • Published June 25, 2026

Code analysis of signature-based approval drainers, EIP-712 typed data hazards, and real-time transaction simulation strategies for Web3 dApps.

Signature-based phishing drainers targeting ERC20 Permit and Permit2 contracts account for over $100M in stolen assets across Web3 in 2025-2026.

Attack Mechanics:
Attackers present users with obfuscated EIP-712 signature popups disguised as simple dApp logins or gasless token claims. Behind the scenes, the payload grants unlimited spender permissions to an attacker contract.

Defense Framework:
Secure Chain X Smart Guards integrate pre-execution mempool simulation. Before any signature is signed or broadcast, the Smart Guard engine decodes the bytecode payload and displays exact asset permissions to the user.

Source: Secure Chain X Security Research Lab Read More Articles →