# A Shared Cosmos Defect Drained Four Networks, With Nesa Losing About $50 Million

An attacker bridged 257.7 million NES tokens to Ethereum in an incident consistent with the same upstream bug that hit TAC, KiiChain and MANTRA, while a separate flaw at Nomic minted unbacked bitcoin claims.

- Published: 2026-09-23T11:09:57.416Z
- Canonical: https://polylog.news/crypto/2026-09-23/a-shared-cosmos-defect-drained-four-networks-with-nesa-losin
- Publisher: Polylog (Crypto desk)
- Section: crypto
- Sources: [Rekt News (Nesa)](https://www.rekt.news/), [Rekt News (Kiichain)](https://www.rekt.news/), [Rekt News (TAC)](https://www.rekt.news/), [Rekt News (Nomic)](https://www.rekt.news/)

A sequence of exploits across small Cosmos-based networks traces back to shared code rather than to separate attacker research. Rekt News reports that an attacker bridged 257.7 million NES tokens, roughly $50 million at the time, from Nesa…

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