The Sui blockchain network, developed by Mysten Labs, experienced a major outage on May 28, 2026, halting block production for nearly three hours. This marks the second significant outage for the layer 1 network in 2026. The Sui Core team had not disclosed the cause at press time. The SUI token declined 8% in the 24 hours preceding the outage.
Sui network outage
- ▪The Sui network mainnet stalled on May 28, 2026, temporarily halting transaction processing
- ▪The Sui Core team had not disclosed the cause of the May 28, 2026 network outage at press time
- ▪The May 28, 2026 Sui network outage is the second outage the Sui network has experienced in 2026
Sui blockchain background
- ▪Mysten Labs developed the Sui network
- ▪The Sui blockchain launched in 2023
- ▪The Sui blockchain is a layer 1 blockchain that competes with Ethereum and Solana by offering high-speed transactions and low fees
SUI token price impact
- ▪The SUI token price declined 8% in the 24 hours preceding May 28, 2026, 4:11 p.m.
- ▪Broader crypto market conditions were mixed on May 28, 2026
Blockchain reliability concerns
- ▪Blockchain outages are a closely watched issue for traders and developers, particularly for networks marketed as high-performance infrastructure for decentralized finance and gaming applications
- ▪The Sui blockchain has previously faced periods of degraded performance and outages
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