Hack history / 2023 / Hack or exploit
Orbit Bridge
Hack or exploit on Dec 31, 2023 · Signature Verification Flaw
SOURCES AGREE ON DATE AND LOSS · 5 SOURCES
Lost
$81.6M
dollars at the time
Returned
none listed
as the sources state it
Rank
#73
among thefts by dollars lost
What happened
Orbit Bridge was drained for ~$81.5M across its Ethereum vault when 7 of 10 multisig signer private keys were compromised, enabling fraudulent withdrawal signatures.
Details
- Date
- Dec 31, 2023
- Kind
- Hack or exploit
- Method
- Signature Verification Flaw
- How in
- Smart contract bug
- Target
- DeFi protocol
- Chains
- Ethereum
- Audit (rekt.news)
- out of scope
Related incidents
Cite this page
SwanBluechip, "Orbit Bridge hack, Dec 31, 2023: $81.6M lost", Crypto hack history, https://swan-hack-tracker.pages.dev/history/i/ht4c607804cc/ (data as of 2026-10-31).