Hack history / 2026 / Hack or exploit
Cozy V2
Hack or exploit on Sep 7, 2026 · Unknown
SOURCES DISAGREE ON DATE OR LOSS · 3 SOURCES
Lost
$160K
dollars at the time
Returned
none listed
as the sources state it
Rank
#1,562
among thefts by dollars lost
What happened
Cozy Finance confirmed an exploit affecting its v2 protection markets on Optimism, draining funds from the Main Set and Rabbithole Set. The affected markets relied on UMA’s Optimistic Oracle to resolve covered events. Cozy subsequently paused the affected Sets and stated there were no longer any open proposals against its UMA-based markets while it coordinated with UMA regarding dispute resolution. The precise mechanism that allowed the attacker to obtain payouts has not yet been confirmed
Details
- Date
- Sep 7, 2026
- Kind
- Hack or exploit
- Method
- Unknown
- How in
- Smart contract bug
- Target
- DeFi protocol
- Chains
- Optimism
Reported by
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Cite this page
SwanBluechip, "Cozy V2 hack, Sep 7, 2026: $160K lost", Crypto hack history, https://swan-hack-tracker.pages.dev/history/i/htbadc2ad6d4/ (data as of 2026-10-31).