Security2 hOctober 23, 2026, 07:46

Qubic restarts chain, opens claims after $1.4M weak-seed hack

Qubic restarted its mainnet on October 19 and opened a claims platform on October 20 after predictable wallet seeds let an attacker drain about $1.4 million in QU tokens from 1,404 accounts. The flaw was in the web wallet's random-number generator on certain Apple devices and browsers; version 4.26.4 fixes it, and claims are open until May 1, 2027.

The Tech Report

Open source

Attack hit 1,404 wallets, draining roughly $1.4M in QU tokens
Mainnet halted October 18 and resumed October 19 past tick 85,371,949
Flaw was in seed generation in the web wallet on Apple devices
Reclaim claims accepted until May 1, 2027

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