Starknet incident

Starknet mainnet – slow block creation alert

Critical Resolved View vendor source →

Starknet experienced a critical incident on January 5, 2026 affecting Starknet Mainnet, lasting 4h 8m. The incident has been resolved; the full update timeline is below.

Started
Jan 05, 2026, 09:53 AM UTC
Resolved
Jan 05, 2026, 02:02 PM UTC
Duration
4h 8m
Detected by Pingoru
Jan 05, 2026, 09:53 AM UTC

Affected components

Starknet Mainnet

Update timeline

  1. investigating Jan 05, 2026, 09:53 AM UTC

    Starknet is taking longer than expected to produce a block.

  2. investigating Jan 05, 2026, 10:42 AM UTC

    The team still investigate the reason for discrepency between the execution of the block to the proving logic. Concrete transaction and differences have been detected and we are debugging for the reasons

  3. identified Jan 05, 2026, 01:23 PM UTC

    The issue was identified and tested. A new blockifier version is released, chain is reverted to block 5187263

  4. resolved Jan 05, 2026, 02:02 PM UTC

    This incident has been resolved.