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THORChain v3.21 Restores Solana and Zcash Trading, Fixes Rujira Exploit

TL;DR: The THORChain v3.21 update is scheduled to activate at block height 28,366,100, estimated for October 23, 2026. The release patches an exploit in Rujira Network’s FIN contract and resolves technical flaws that…

By DeFi Tools Guide Editorial Team · Published Oct 19, 2026, 1:10 PM UTC · Updated 2026-10-19 · Risk level: medium
Sources checked: Oct 19, 2026, 10:16 PM UTC

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What happened

TL;DR: The THORChain v3.21 update is scheduled to activate at block height 28,366,100, estimated for October 23, 2026. The release patches an exploit in Rujira Network’s FIN contract and resolves technical flaws that halted Solana and Zcash trading.

Reported details

  • The upgrade targets block 28,366,100 around Oct. 23, while Rujira plans to request a conditional 24-hour liquidation grace period for borrowers.

Why this matters

This reads as a change in infrastructure rather than a move in price, and that distinction decides what is worth verifying: whether the underlying record moved, or only the interface around it. If a ledger, custodian or settlement term is unchanged, then anything built on top of it behaves the same too, however the announcement is framed. Subject of the report: THORChain v321 Restores Solana.

Evidence boundary

On THORChain v3.21 Restores Solana, the scope is limited to what the linked 2 reports state, and where they diverge both positions are recorded without either being picked in advance; the headline figure is what to check first.

What to verify

If THORChain v321 Restores Solana points at a contract or a chain, verify the deployed address and version there. If it describes an internal or corporate change with no on-chain component, the chain is the wrong place to look.

Sources and editorial check time

This information is educational and is not financial, legal, or tax advice.

Sources