Solana came close to a network finality halt on the morning of August 12, 2026, after 28.83% of staked SOL went delinquent following a routing failure at infrastructure provider Teraswitch.
According to an analysis by staking platform Marinade Finance, the incident brought the network to 86% of the threshold where transaction finality would stop, leaving roughly 19.9 million SOL of headroom before the critical 33.34% mark.
Marinade Finance notes that the disruption stemmed from a BGP routing error at Teraswitch. A default route originating from the provider’s Miami site was advertised without proper attributes.
Data from Validators App, shows a route reflector in Amsterdam then propagated it across sites in Europe and Asia-Pacific. This left 12 key locations, including facilities in London, Amsterdam, Dublin, Frankfurt, Singapore, and Tokyo, without valid forwarding paths. North American validators remained largely unaffected.
The incident led to approximately 90 validators going offline, resulting in a collective loss of 333 SOL in staking rewards. Traffic began recovering within about 10 minutes, with full restoration taking up to 33 minutes for some operators.
Notably, AS20326, which hosts more than a quarter of all staked SOL (around 122.39 million SOL), saw 94% of its stake go dark simultaneously, pushing its effective share above the Solana Foundation Delegation Program’s 25% recommended cap.
Helius, one of the network’s largest validators, remained offline for the full duration of the event. Meanwhile, only a few operators successfully failed to backup infrastructure.
Infrastructure Concentration Raises Concerns Amid Past Outages
The near-miss has reignited discussions about Solana’s infrastructure concentration risks. Marinade noted that counting stake purely by hosting provider underestimates correlated failures, as additional stake on other providers also went down concurrently.
The platform announced it will tighten its own per-ASN and per-data-center concentration limits and begin publishing whether validators support hot-swap and automatic failover capabilities.
Solana has a history of outages in the past, particularly during its earlier years when network congestion, software bugs, and spam attacks caused multiple full or partial halts lasting hours.
While the chain has maintained a longer stretch without complete stoppages in recent periods, today’s event demonstrated that finality—rather than pure block production—can still be threatened by single points of failure in the underlying network layer. Blocks may continue to be produced, but without sufficient stake online, transactions cannot be finalized as irreversible.
Validators and stake pools are now under pressure to improve redundancy. The modest economic impact of 333 SOL in lost rewards belies the systemic risk: had delinquency crossed one-third of stake, finality would have stalled network-wide with no simple recovery bond available.
While the rapid resolution averted that scenario, the episode serves as a clear reminder of the need for greater geographic and provider diversification across Solana’s validator set.
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