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Hack history / 2023 / Hack or exploit

Cypher

Hack or exploit on Aug 7, 2023 · Spot Price Manipulation

SOURCES AGREE ON DATE AND LOSS · 3 SOURCES
Lost
$1M
dollars at the time
Returned
$600K
58% of the loss, as a source states it
Rank
#914
among thefts by dollars lost

What happened

Cypher Protocol, a Solana-based futures exchange, was exploited for ~$1.035M via flashloan-enabled price manipulation. The attacker artificially inflated token prices through flashloans and exploited the protocol's economic model through repeated buying and selling at manipulated prices.

Details

Date
Aug 7, 2023
Kind
Hack or exploit
Method
Spot Price Manipulation
How in
Price, oracle and governance
Target
DeFi protocol
Chains
Solana

After the theft

Frozen
$600K
“On August 18, Cypher stated that approximately $600,000 has been frozen on various centralized exchanges (CEXs), and the return of these funds will depend on the cooperation of these CEXs and seizure orders issued by law enforcement agencies.” (SlowMist Hacked)
Recovered or frozen
$600K
“$1.0M taken, $435K after recovery or freezing” (Web3 Is Going Great)

Reported by

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Cite this pageSwanBluechip, "Cypher hack, Aug 7, 2023: $1M lost", Crypto hack history, https://swan-hack-tracker.pages.dev/history/i/htf873183900/ (data as of 2026-10-31).
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