At 04:16 UTC on August 12, Solana finished recovering from 33 minutes that nearly stopped it. A routing bug at one hosting provider had pulled 28.83% of all staked SOL offline, and the network loses transaction finality once that figure passes 33.34%. Divide one by the other. You get 86%, which is how close the chain came to freezing before it caught itself.
The provider was TeraSwitch, operating under the autonomous system AS20326. It carried roughly 118.9 million SOL, about 27.34% of all staked SOL on the network. A misconfigured default route leaked out of one site, spread through a router in Amsterdam, and edge servers across Europe and Asia began preferring a dead path. Around 94% of the validators sitting behind that provider stopped voting within minutes.
One route change knocked a quarter of the network quiet
Validators that stop voting go delinquent. That morning 102 of 699 staked validators dropped out, while 597 kept signing blocks. Roughly 90 of them lost a combined 333 SOL in missed rewards. Small money. Nobody was writing about the rewards.
What mattered was where the stake lived. More than a quarter of the network's security sat inside a single failure domain, one company, one autonomous system. Solana sells raw speed and has spent years chasing throughput records, the same pitch every high-performance chain makes. Reliability is the number that gets read after the outage, not before.
The cap had already been crossed before the bug hit
The Solana Foundation Delegation Program writes rules meant to prevent this precise event. Since May 1, 2026, a validator has to run on an ASN and hosting provider holding under 25% of overall network stake, with data center concentration capped at 15%. TeraSwitch was sitting at 27.34% when its routing failed. The line was already behind them.
| Metric on August 12 | Limit or threshold | Actual |
|---|---|---|
| Stake behind one provider (SFDP rule) | 25% | 27.34% |
| Staked SOL offline (finality halts above) | 33.34% | 28.83% |
| Distance traveled toward a finality halt | 100% | 86% |
Marinade Finance said it flatly: Solana got 86% of the way to a halt that morning and it barely registered anywhere. One review of validator setups found only 3 of 74 ran automatic failover, and Helius, the second-largest validator on the network, stayed dark for the full 33 minutes. Demand keeps arriving anyway, even after Solana ETFs opened to a quiet start.
Blocks were produced the entire time, so from a trading screen nothing looked wrong. Engineers caught the fault inside ten minutes and cut the bad site off, which is why it ran 33 minutes and not longer. What has not changed is the map underneath. The same share of staked SOL still sits behind that one provider, and the Foundation's 25% cap still reads as a target rather than a limit anyone is enforcing.
