Qubic said its Layer 1 network has resumed normal operations after an attack, with the Computor Arbitration Committee approving a recovery plan and the official claims portal now live. The project said an initial batch of funds has already been returned to verified owners, while affected assets were moved into protected escrow accounts during the network pause to reduce further risk exposure. Qubic also warned that any wallet created with versions earlier than Qubic web wallet 4.26.4, released on Oct. 19, should be treated as unsafe even if the funds were not affected. Users are being told to upgrade to version 4.26.4 or later and create a new wallet. The claims window for affected users will remain open until May 1, 2027, with submissions backed by clear evidence set to receive priority handling. Qubic had previously said the attacker exploited insufficient randomness in seed generation for some wallets between Oct. 17 at 23:42 UTC and Oct. 18 at 01:26 UTC, compromising 1,404 wallets and stealing about 2.94 trillion QU.
Layer 1 blockchain Qubic said its network has returned to normal operations after the attack.
The project said the Computor Arbitration Committee has approved a recovery plan, the official claims platform is now open, and an initial batch of funds has already been returned to verified owners. During the network suspension, affected funds were transferred into protected escrow accounts to keep them from remaining exposed to risk.
Wallet upgrade and claims process
Qubic said any wallet created before version 4.26.4 of the Qubic web wallet should be treated as unsafe, even if the funds were not affected. That version was released on Oct. 19.
Users are required to upgrade to version 4.26.4 or later and create a new wallet. Affected users can submit claims through the official claims website, and the claims window will remain open until May 1, 2027. Claims supported by clear evidence will be handled first.
Attack window and losses
Qubic had previously disclosed that the attack took place between Oct. 17 at 23:42 UTC and Oct. 18 at 01:26 UTC. The attacker exploited insufficient randomness in seed generation for some wallets, compromising 1,404 wallets and stealing about 2.94 trillion QU.
After the incident, Qubic network validator nodes coordinated a network halt to prevent the stolen funds from being moved or sold further.
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