Starknet incident

Cairo0 code unrecognized by the sequencer

Major Resolved View vendor source →

Starknet experienced a major incident on September 1, 2025 affecting Starknet Mainnet and Starknet Testnet (Sepolia), lasting 1d 4h. The incident has been resolved; the full update timeline is below.

Started
Sep 01, 2025, 12:11 PM UTC
Resolved
Sep 02, 2025, 05:05 PM UTC
Duration
1d 4h
Detected by Pingoru
Sep 01, 2025, 12:11 PM UTC

Affected components

Starknet MainnetStarknet Testnet (Sepolia)

Update timeline

  1. identified Sep 01, 2025, 12:11 PM UTC

    Cairo0 code is currently unusable within Starknet mainnet and Sepolia. We identified the bug and working to fix it asap

  2. monitoring Sep 01, 2025, 05:28 PM UTC

    A fix has been implemented and we are monitoring the results.

  3. resolved Sep 02, 2025, 05:05 PM UTC

    This incident has been resolved.