Sui Network Experiences Three Outages; Foundation Deploys Major Bug Fix
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Sui Network Experiences Three Outages; Foundation Deploys Major Bug Fix

Sui mainnet suffered three separate outages Monday totaling over 15 hours of halted activity, caused by bugs in version 1.72. The Sui Foundation deployed a major upgrade to resolve the issues; user funds remained secure throughout.

Jun 1, 2026, 08:03 AM1 min read

Key Takeaways

  • 1## Network Outages and Root Cause Sui mainnet went offline three times on Monday, accumulating more than 15 hours of downtime.
  • 2The Sui Foundation attributed the outages to bugs in version 1.
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  • 4According to the foundation's statement, user funds were not at risk during any of the incidents, though transaction processing and block production halted.
  • 5## Foundation Response The Sui Foundation rolled out a major upgrade to fix the underlying bugs behind the outages.

Network Outages and Root Cause

Sui mainnet went offline three times on Monday, accumulating more than 15 hours of downtime. The Sui Foundation attributed the outages to bugs in version 1.72. According to the foundation's statement, user funds were not at risk during any of the incidents, though transaction processing and block production halted.

Foundation Response

The Sui Foundation rolled out a major upgrade to fix the underlying bugs behind the outages. The foundation did not disclose details of the specific vulnerabilities or changes in the upgrade at the time of announcement. Network activity resumed following deployment of the patch.

Why It Matters

For Traders

Extended mainnet downtime blocks transaction settlement and order execution; participants with open positions on Sui faced uncertainty until service restored.

For Investors

Multiple outages in a single day raise questions about 1.72 release testing; the foundation's rapid fix suggests process gaps that could affect future upgrades.

For Builders

Developers shipping on Sui should review their own testing practices and consider delaying mainnet deployments until the foundation publishes detailed postmortem and upgrade notes.

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