wormhole-bridge

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vulnerability

A critical vulnerability in tBTC's L2WormholeGateway contract allowed attackers to mint unlimited Layer 2 tBTC tokens by exploiting the depositWormholeTbtc function through a reentrancy-like pattern in cross-chain bridging. The vulnerability was discovered via Immunefi bug bounty, patched before exploitation, and mitigated by removing the vulnerable function and adding reentrancy protection.

Threshold Network tBTC Immunefi Wormhole L2WormholeGateway Ɓukasz Zimnoch Arbitrum Base Optimism Polygon
blog.threshold.network · unknown · 22 hours ago · details