Two cryptocurrency bridge exploits were discussed on X: Nomic's nBTC bridge suffered a double-spend attack freezing 22.65 BTC ($1.8M) on Osmosis DEX, affecting 36% of Alloyed BTC's backing; separately, Beldex announced resolution of its June bridge exploit after Hardfork 21, with all exchanges compensated and the network restored to normal operation.
A security vulnerability in Nomic's IBC bridge allowed double-minting of nBTC tokens, resulting in 40.65 nBTC being created and subsequently drained across multiple blockchain networks. The attacker exploited a code flaw that minted coins twice for single deposits, then converted the stolen assets to ETH and USDC through Osmosis, Axelar, and other cross-chain bridges, ultimately netting approximately 600+ ETH equivalent.