Hack history / 2026 / Hack or exploit
Nomic
Hack or exploit on Sep 9, 2026 · Unbacked Cross-Chain Mint
IN REVIEWSOURCES DISAGREE ON DATE OR LOSS · 3 SOURCES
Lost
$3.1M
dollars at the time
Returned
none listed
as the sources state it
Rank
#579
among thefts by dollars lost
What happened
A vulnerability in Nomic’s custom forwarding mechanism allowed an attacker to double-spend nBTC and generate false cross-chain vouchers that were sent to Osmosis. These vouchers resulted in unbacked nBTC entering Osmosis and becoming part of Alloyed BTC’s backing. Osmosis and IBC were not compromised. After detecting the issue, Osmosis froze Nomic and Alloyed BTC inflows and outflows and coordinated an emergency upgrade with validators that froze 22.65 BTC in the attacker’s address
In review: sources disagree on the date.
Details
- Date
- Sep 9, 2026
- Kind
- Hack or exploit
- Method
- Unbacked Cross-Chain Mint
- How in
- Bridge and cross-chain
- Target
- DeFi protocol
- Chains
- Nomic
After the theft
- Frozen
- yes, amount not stated
“After detecting the issue, Osmosis froze Nomic and Alloyed BTC inflows and outflows and coordinated an emergency upgrade with validators that froze 22.65 BTC in the attacker’s address” (DefiLlama)
Reported by
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Cite this page
SwanBluechip, "Nomic hack, Sep 9, 2026: $3.1M lost", Crypto hack history, https://swan-hack-tracker.pages.dev/history/i/htb423b61fcd/ (data as of 2026-10-31).