Yearn Finance encountered a serious attack on the yETH product, as a result of which the attacker managed to withdraw about a thousand ETH — almost 3 million dollars — taking advantage of a vulnerability in the stable swap pool's operation. The exploit allowed in one action to create an almost infinite amount of yETH, quickly cash out the liquidity and partially cover up traces through Tornado Cash. Before the incident, there were about 11 million dollars in the pool, however, the main repositories of Yearn Finance — V2 and V3 — were not affected.