An attacker exploited the Harmony blockchain to mint 4 billion ONE tokens, causing the token price to plunge 40%. Harmony paused its token bridge, asked exchanges to freeze funds, and is considering a rollback.
Ravencoin experienced an exploit allowing attackers to mine invalid blocks, leading to a controversial rollback of four days of blockchain history. Several exchanges have halted withdrawals and deposits.
In week 33 of 2026, $3.3 million was stolen across four incidents, including a consensus failure on Harmony and Ravencoin, and multiple PII leaks affecting crypto users.