The Sui mainnet resumed operation after a nearly 6-hour outage. The project team stated that the failure stemmed from a vulnerability introduced in version 1.72, which affected the gas billing logic and caused the mainnet to temporarily stop processing transactions.
Version 1.72 vulnerability caused system shutdown
Sui had previously ed users to a network "stagnation," stating that transactions might be delayed or suspended. Developers then began deploying a fix. Approximately 5 hours and 55 minutes later, the team confirmed that network activity had resumed and stated they would release a full recap in the coming days.
However, shortly after the network was restored, some validators were still reported to be running in a degraded state, indicating that although the system was back online, its performance had not yet fully returned to normal levels.
This is the second major disruption of the year.
This marks the second major outage for Sui in 2026. Previously, in January of this year, the network experienced an outage lasting over six hours. Going back further, in November 2024, Sui validators were caught in a crash loop, causing transaction processing to stall for approximately two and a half hours.
The series of outages may once again draw attention to the stability of this public blockchain, especially given its expansion towards high-throughput financial applications and institutional scenarios.
SUI rebounded after short-term pressure.
Market sentiment weakened rapidly after the outage. SUI fell by about 6% to around $0.90 during the disruption, before recovering to around $0.92 after service was restored.
Despite the outage, Sui remains one of the largest public blockchain ecosystems. DeFiLlama data shows that the total value locked on the Sui chain is approximately $542 million, covering 137 protocols. Just weeks before this outage, SUI had surged by about 50% due to a series of positive developments, including a Nasdaq-listed company announcing plans to stake a large amount of SUI, and the development team previewing features such as zero-fee stablecoin transfers and privacy transactions.
