Cross-chain oracle compromise triggers liquidations and frozen vaults across multiple DeFi networks

Switchboard, an oracle provider for DeFi applications, halted deployments on four Move‑language chains—Aptos, Sui, IOTA and Movement—after reports of a potential compromise in its Move oracle implementation.

Impact on DeFi protocols

At least three protocols disclosed material effects:

• Full Sail confirmed that its vaults suffered losses and that deposits and withdrawals remain paused pending verification of oracle integrity. The disclosure did not specify which vaults or assets were affected, nor the size of the loss.
• Virtue, an IOTA‑based credit protocol, reported that an attacker seized signing keys for all 14 Switchboard oracles on IOTA, inflated the IOTA price to $10 million, deposited 1 IOTA and minted roughly 4.94 million VUSD. The price was later driven near zero, triggering 47 liquidations that impacted 45 users and freezing all borrowing‑related actions.
• Volo on Sui paused vault deposits and withdrawals as a precaution. The protocol stated that its vaults were unaffected and user funds remained safe.

Technical safeguards and unknowns

Full Sail’s documentation describes oracle‑protection checks that compare Switchboard prices with on‑chain pool prices, evaluate 50‑70 recent observations, and can block anomalous prices or pause emissions. It is unclear whether these controls activated during the incident.

Switchboard has not released a root‑cause analysis, a timeline for restoring the Move deployments, or a comprehensive list of affected integrations.

Chain status

On August 31, Sui’s status page indicated all systems operational, and IOTA’s mainnet page listed incidents as resolved. No comparable status information was available for Aptos or Movement.

Financial context

DefiLlama reported Full Sail’s total value locked at approximately $229 k on August 31, with rolling DEX volumes of $50 (24 h), $2.99 M (7 d) and $9.10 M (30 d). These figures include activity before the incident and do not isolate the impact of the compromise.