On August 12, a routing failure at infrastructure provider TeraSwitch led to the simultaneous disconnection of validators responsible for 28.83% of SOL in staking. This figure approached the 33.34% threshold, at which the network would have stopped finalizing transactions, according to Marinade Finance.
1/ Solana got 86% of the way to a halt this morning and it barely registered anywhere.
28.83% of staked SOL went delinquent. Finality stops at 33.34%.
We added up the rewards lost across all 90 affected validators. 333 SOL. pic.twitter.com/EEC2gYwQgz— Marinade 🛡️ (@MarinadeFinance) August 12, 2026
The incident affected about 90 validators. TeraSwitch’s autonomous system AS20326 accounted for 118.9 million SOL, or 27.34% of the network’s total stake. During the outage, 94% of this amount was disconnected simultaneously.
The critical level was ultimately not reached. Routing was restored after approximately 33 minutes, and validators rejoined the network. During the downtime, they missed out on about 333 SOL in rewards.
Outage Highlights Infrastructure Risk
Marinade described the event as an example of infrastructure concentration risk. The project plans to review restrictions on the distribution of validators across autonomous systems, data centers, and backup infrastructure.
The issue existed prior to the incident. As of July 22, TeraSwitch serviced validators with approximately 27.1% of Solana’s staked tokens. Following were UAB Cherry Servers (12.7%) and Latitude.sh (11%).
Some major operators already distribute infrastructure among multiple providers. In its first-quarter report, exchange Coinbase reported that 13 of its validators operate through TeraSwitch, while another 10 use Latitude.
For each, the company also uses a backup server in a different location. The exchange team explained this setup as necessary to limit the impact of a single provider’s failure.
In November 2022, German hosting provider Hetzner disconnected servers with Solana nodes. At that time, about 40% of validators with approximately 20% of the total staked coins operated on its infrastructure. The network continued to function.
In January 2026, the number of active Solana validators dropped to 800, the lowest level since 2021. At its peak in 2023, there were more than 2,500.
