Hack history / 2023 / Hack or exploit
BNO
Hack or exploit on Jul 18, 2023 · Improper Access Control
ATTACK TX CONFIRMED ON CHAINSOURCES AGREE ON DATE AND LOSS · 3 SOURCES
Lost
$500K
dollars at the time
Returned
none listed
as the sources state it
Rank
#1,153
among thefts by dollars lost
What happened
BNO's emergencyWithdraw function on BNB Chain lacked access controls and didn't check for NFT rights records. An attacker exploited this to deposit both NFT and ERC20 tokens, then withdraw only the ERC20 via emergencyWithdraw, bypassing reward calculations and earning undeserved mining rewards.
Details
- Date
- Jul 18, 2023
- Kind
- Hack or exploit
- Method
- Improper Access Control
- How in
- Smart contract bug
- Target
- DeFi protocol
- Chains
- BNB Chain
Reported by
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Cite this page
SwanBluechip, "BNO hack, Jul 18, 2023: $500K lost", Crypto hack history, https://swan-hack-tracker.pages.dev/history/i/ht8ca74dee23/ (data as of 2026-10-31).