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Hack history / 2021 / Hack or exploit

Alchemix V2

Hack or exploit on Jun 16, 2021 · Borrow Logic Flaw

IN REVIEWSOURCES AGREE ON DATE AND LOSS · 3 SOURCES
Lost
$6.5M
dollars at the time
Returned
none listed
as the sources state it
Rank
#401
among thefts by dollars lost

What happened

Alchemix alETH vault exploited via incorrect vault indexing in the deployment script. Wrong index in debt calculations allowed collateral withdrawal without loan repayment.

In review: possible duplicate within one source.

Details

Date
Jun 16, 2021
Kind
Hack or exploit
Method
Borrow Logic Flaw
How in
Smart contract bug
Target
DeFi protocol
Chains
Ethereum
Audit (rekt.news)
unaudited

Reported by

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Cite this pageSwanBluechip, "Alchemix V2 hack, Jun 16, 2021: $6.5M lost", Crypto hack history, https://swan-hack-tracker.pages.dev/history/i/ht2591504322/ (data as of 2026-10-31).
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