Hack history / 2023 / Hack or exploit
GMBL.COMPUTER
Hack or exploit on Sep 6, 2023 · Signature Verification Flaw
SOURCES AGREE ON DATE AND LOSS · 3 SOURCES
Lost
$772K
sources: $770K to $815K
Returned
$2K
0% of the loss, as a source states it
Rank
#1,013
among thefts by dollars lost
What happened
On September 6, 2023, hours after launch, GMBL.COMPUTER on Arbitrum was exploited when the off-chain signature server issued valid signatures for spoofed referral claims without verifying deposits, draining ~471 ETH.
Details
- Date
- Sep 6, 2023
- Kind
- Hack or exploit
- Method
- Signature Verification Flaw
- How in
- Smart contract bug
- Target
- DeFi protocol
- Chains
- Arbitrum, Ethereum
After the theft
- Recovered or frozen
- $2K
“$772K taken, $770K after recovery or freezing” (Web3 Is Going Great)
Related incidents
Cite this page
SwanBluechip, "GMBL.COMPUTER hack, Sep 6, 2023: $772K lost", Crypto hack history, https://swan-hack-tracker.pages.dev/history/i/ht96712458fa/ (data as of 2026-10-31).