Full Sail Winds Down Sui (SUI) DeFi Protocol After $91,000 Oracle Vault Drain

Full Sail Winds Down on Sui

Full Sail, a decentralized finance protocol built on the Sui blockchain, announced on Tuesday that it is shutting down permanently after a security incident involving oracle provider Switchboard drained roughly $91,000 from three of its automated vaults. The team's official X post frames the sunset as the conclusion reached after final security checks, with the return of affected users' funds named as the immediate priority. The shutdown took effect at once: claims for liquidity provider rewards were disabled, new deposits were cut off, and regular pools moved into withdrawal-only mode. Full Sail had first confirmed a loss of funds on Saturday, pausing deposits and withdrawals while it investigated the suspected compromise of Switchboard's oracle infrastructure. Under the wind-down plan, all remaining protocol-owned liquidity will be used to compensate users, and the team has pledged to absorb any shortfall so community depositors are repaid first, with withdrawal and claim instructions to follow within days. The $91,000 figure is modest by current exploit standards, but the choice to dissolve rather than rebuild signals that the team judged depositor trust too damaged to justify continued operation. It is also an unusual end state: not a rug pull or a vanished team, but an orderly, self-funded liquidation triggered entirely by failures in third-party price-feed infrastructure the protocol did not control. For a protocol whose core product was automated liquidity pool vaults on the Sui ecosystem, the drain struck directly at the mechanism that generated yield for depositors. The episode also lands just weeks after wallet provider Phantom said it would deliver Phantom's pending end to Sui support, compounding pressure on the network's third-party service layer.

Four-Chain Oracle Halt

The root cause traces back to Switchboard, the oracle supplier whose price feeds the affected protocols consume for valuing positions and triggering liquidations. On Saturday, Switchboard's own statement said it was investigating a potential compromise of its Move-based implementations — the code variant it ships for Move-language chains — and urgently halted its network across Aptos, Sui, IOTA and Movement. That halt meant DeFi protocols on all four chains were simultaneously exposed to abnormal oracle quotes, with no independent fallback in place. Full Sail was not the only casualty: Virtue, a stablecoin lending protocol on IOTA, separately reported losses of about $455,000 and warned that the asset backing of its VUSD stablecoin had been impaired, a development that raises depeg risk for the token. Combined, the two confirmed losses exceed $546,000, all traceable to a single oracle provider. The incident also arrives on an ecosystem with recent scar tissue. In April 2026 alone, the lending protocol Volo lost $3.5 million to an exploit whose losses the team absorbed, Scallop was attacked for 150,000 SUI and committed to full compensation, and AftermathFi was drained of $1.1 million in USDC. Earlier, in October 2025, Typus Finance suffered an oracle exploit that forced a suspension of its smart contracts. Four major security events in five months, before this week's wind-down, show that doubts about safety across altcoin DeFi ecosystems — and on Sui specifically — have not faded even as the chain's total value locked has grown. The pattern is consistent: in none of these cases did the base layer of the chain itself fail; the breaches sat at the application and infrastructure layer, where the shared assumptions of omnichain infrastructure and contract logic create the attack surface. For users still navigating the network, our beginner guide to using Sui covers wallet setup and transaction basics.

Oracle Risk Outlasts Compensation

The arc here is not the size of the loss but the topology of trust: one oracle implementation exposed protocols across four Move-based chains at once, and on-chain records let anyone trace the attacker's withdrawal transactions from the affected vaults. Full Sail's official post-mortem on X confirms the suspected compromise of Switchboard's Move-based code and its remediation — an immediate network halt plus a liquidity-backed repayment plan. That is the right crisis response, yet compensation can only mop up after the fact. Until oracle feeds are decentralized or independently monitored, DeFi on Sui and its peer chains retains a single point of failure that no vault-level audit can fully cover.