Hack history / 2014 / Hack or exploit
Poloniex
Hack or exploit on Mar 4, 2014 · Withdrawal Logic Flaw
SOURCES AGREE ON DATE AND LOSS · 2 SOURCES
Lost
$50K
dollars at the time
Returned
none listed
as the sources state it
Rank
#1,934
among thefts by dollars lost
What happened
An attacker discovered a race condition in Poloniex's withdrawal processing logic. By submitting multiple concurrent withdrawal requests, the attacker could deplete accounts to negative balances before the system updated withdrawal state, extracting 97 BTC without having that balance.
Details
- Date
- Mar 4, 2014
- Kind
- Hack or exploit
- Method
- Withdrawal Logic Flaw
- How in
- Smart contract bug
- Target
- Centralized exchange
- Chains
- Bitcoin
Reported by
Related incidents
Cite this page
SwanBluechip, "Poloniex hack, Mar 4, 2014: $50K lost", Crypto hack history, https://swan-hack-tracker.pages.dev/history/i/ht83617a7073/ (data as of 2026-10-31).