Gravity Bridge, a Cosmos-native cross-chain protocol, was the target of a compromised-key attack, which led to the theft of roughly $5.4 million over the weekend. This latest security breach joins the growing list of exploits suffered in the decentralized finance (DeFi) space so far in 2026. Gravity Bridge Hack Traced To Signing Key Compromise: Investigator On Saturday, May 31st, blockchain sleuth Specter highlighted that Gravity Bridge might have been exploited through what he described as a si