THORChain Lost $10.7M to a Node That Was Already Inside




 The breach did not start on May 15. It started May 1, when a Discord account called Dinosauruss joined the THORChain developer community asking how to get a node churned into the network.

By May 13, the node was in. By May 15, one vault was gone.

THORChain, the decentralized cross-chain liquidity protocol that lets users swap native crypto assets across blockchains without a centralised intermediary, lost approximately $10.7 million when a newly admitted node operator exploited a weakness in the GG20 Threshold Signature Scheme. The system, designed so that no single node ever holds a full vault private key, became the attack vector itself. Each signing ceremony the malicious node participated in handed over another fragment of the key. Two days of routine participation was enough to reconstruct it entirely.

What happened next was actually one of DeFi's faster coordinated responses. The protocol's automatic solvency checker detected the vault imbalance within minutes and froze trading across six chains with no human action required. Between 18 and 20 node operators then manually stacked governance pauses through Discord and pushed formal Mimir votes that brought the entire network to a controlled halt within about two hours of the community alert.

The four remaining vaults were untouched. The SOL pool was confirmed safe. RUNE dropped roughly 15% on the news before stabilising.

Recovery is now a governance question. The THORChain community will vote through ADR-028 on how to handle the $10.7M loss, with options including bond slashing and protocol-owned liquidity absorption. The outcome gets implemented in v3.19.

The development team was already planning to replace GG20 with a newer signing system called DKLS, with Silence Labs contracted to build a custom implementation. The exploit arrived before that work was finished.

For the full breakdown of the timeline, the exact blocks where governance halts activated, and what the patch means for the remaining vaults, read the complete analysis at CryptoNewsLive.org.

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