On November 9, 2026, Ankr’s Ethereum bridge suffered a significant security breach, resulting in a loss exceeding $303,000. The exploit involved five suspicious withdrawals that were linked to a previously redeemed deposit on the Optimism network.
The attack highlights vulnerabilities in cross-chain bridges, especially when deposit transactions are reused or improperly validated, putting user funds at risk. Ankr and the involved teams are investigating the incident to prevent future breaches.