🔑 Arbitrum Ecosystem Cross-Chain Bridge Again Targeted in Attack; Hot Validator Signatures Exploited AFX Trade’s bridge keys were compromised, enabling attackers to approve the withdrawal of 24.15 million USDC using forged hot validator signatures. Arbitrum’s official statement confirmed its native bridge remained unaffected, but the incident once again highlights security vulnerabilities in third-party bridges within its ecosystem. The core issue lies in “hot validator signatures”—where validator private keys are stored online, making them susceptible to theft and signature forgery. Similar mechanisms were exploited in prior attacks on Ronin and Wormhole. Although AFX Trade’s losses are smaller than those of major historical breaches, a $24 million loss still deals a significant blow to trust in the L2 ecosystem. For ARB holders, the security of the native bridge remains fundamental, but repeated incidents involving third-party bridges undermine the broader narrative. Key questions moving forward: Can AFX Trade recover the stolen funds? Will Arbitrum implement stricter audit requirements for ecosystem bridges? $USDC #afx #arb #stablecoin #regulation #riskalert #projectmonitoring #hashanalysis #blockchain #cryptomarket #crypto #web3 #hashchainnews #arbitrum #afxtrade #crosschainbridge #securityincident #defi