Blockchain News
News

Prysm Ethereum Client Outage: Month-Old Bug Costs Validators Over $1 Million

Dario avatar
Shared by Dario • December 15, 2025

A critical software bug, dormant for approximately a month, has led to a significant disruption in the Ethereum network, impacting validators who utilize the Prysm consensus client. The incident, which occurred shortly after the Fusaka upgrade, resulted in missed block proposals and attestations, costing validators an estimated 382 ETH, exceeding $1 million.