Hack history / 2020 / Hack or exploit
YAM
Hack or exploit on Aug 13, 2020 · Contract Vulnerability
ONE SOURCE · 1 SOURCE
Lost
$750K
dollars at the time
Returned
none listed
as the sources state it
Rank
#1,019
among thefts by dollars lost
What happened
On August 13, 2020, the well-known Ethereum DeFi project YAM officially issued a post on Twitter indicating that there were loopholes in the contract. The price plummeted by 99% within 24 hours, resulting in the “permanent destruction” of the governance contract, with a value of 750,000 USD Curve tokens. It is locked and cannot be used. Since the value of totalSupply was taken during rebase, the value of totalSupply calculated incorrectly will not be immediately applied to initSupply through mint, so before the next rebase, the community still has a chance to recover this error and reduce losses. But once the next rebase is executed, the entire mistake will become irreparable.
Details
- Date
- Aug 13, 2020
- Kind
- Hack or exploit
- Method
- Contract Vulnerability
- How in
- Price, oracle and governance
- Target
- not stated
- Chains
- Ethereum
Reported by
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Cite this page
SwanBluechip, "YAM hack, Aug 13, 2020: $750K lost", Crypto hack history, https://swan-hack-tracker.pages.dev/history/i/ht0175248873/ (data as of 2026-11-01).