Harvest Finance
A yield-farming protocol exploited on October 26, 2020 in a flash-loan attack that manipulated Curve pool prices to drain its USDC and USDT vaults. Estimates ranged from ~$24M to ~$33.8M; the attacker returned about $2.5M.
Also known as: Harvest Finance, FARM
Summary
Harvest Finance was a yield-aggregation ("robo-advisor") DeFi protocol. On October 26, 2020, an attacker used Uniswap flash loans to repeatedly skew the prices of USDT and USDC inside a Curve pool that Harvest used to value its vault shares, buying and redeeming shares at manipulated rates to drain the protocol's stablecoin vaults. [1][2]
Scale
Initial estimates of about $24 million were later revised by the team to roughly $33.8 million; the attacker returned about $2.5 million. The exploit, executed in a few minutes, crashed the protocol's FARM token; Harvest published a post-mortem calling it an "engineering error" and offered a bounty for the funds' return. [1][2]
Bracketed numbers refer to the numbered sources listed below.
Sources (2)
See also
World Liberty Financial (WLFI) — Justin Sun token freezeProjectsWLFI, a DeFi project linked to Donald Trump and his family, blacklisted/froze the wallet of major investor Justin Sun in Sept 2025 — ~540–595M unlocked WLFI tokens (~$107M) plus ~2.4B locked. Sun sued, alleging an undisclosed admin 'blacklist backdoor'; WLFI denied it and threatened a countersuit. The dispute is ongoing.
Gala Games exploitTokensOn May 20, 2024 an attacker abused a privileged minter account on the GALA token contract to mint 5 billion GALA (≈$200M+ nominal) and dumped ~600M of them for ~$22M of ETH before Gala froze the address. Gala Games called it an internal access-control failure; the attacker later returned the ~$22M.
This page was last updated on Jun 15, 2026. View revision history.
