Osmosis: Nomic nBTC Double-Spend Hits Alloyed BTC Backing; 22.65 BTC Frozen

Osmosis said a Nomic-chain exploit let an attacker double-spend nBTC and send fake vouchers into Osmosis. About 39.84 nBTC — roughly 36% of Alloyed BTC backing — is affected. Osmosis paused inflows and outflows; an emergency upgrade froze 22.65 BTC in the attacker’s address. Osmosis and IBC were not compromised.

Editor

Sep 9, 2026 · 1mo ago

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Osmosis: Nomic nBTC Double-Spend Hits Alloyed BTC Backing; 22.65 BTC Frozen

Osmosis said an exploit on the Nomic chain allowed an attacker to double-spend nBTC and send fake vouchers into Osmosis. That is Wu Blockchain, reading Osmosis’s X update.

Osmosis and IBC were not compromised, Wu stamps from Osmosis.

What was hit

39.84 nBTC, representing about 36% of Alloyed BTC’s backing, is affected. Osmosis has paused inflows and outflows. An emergency upgrade froze 22.65 BTC in the attacker’s address.

Restoration path

Osmosis plans to seek governance approval to seize the frozen assets and use BTC from the community pool to restore full backing.

Informational only. Not trading advice, signals, or a guarantee of any market outcome.

Written and fact-checked with AI assistance, reviewed by a human editor before publication.

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