Solana validators holding 20.3% of stake flagged as unprepared before Alpenglow

With Solana's biggest consensus overhaul expected to go live on October 21, 151 validators still fall short of the new requirements Solana is about to swap out the engine of its consensus system. A readiness snapshot shared on X flagged 151 Solana validators, holding 20.3% of the network’s stake , as unprepared for the Alpenglow upgrade. Alpenglow is expected to activate on October 21, 2026, at approximately 13:20 UTC. The snapshot was taken on October 20, one day before the switch. Validators who want to keep voting on blocks need three things in order. First, they must run an Agave-based client at version 4.3.2. Agave is the validator software that most of the network runs. Older versions won’t satisfy the new rules.

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