Assets in Sentora's RLUSD and PayPal USD lending vaults on Morpho fell sharply on Sept. 30, cutting available liquidity to roughly $8.46 million and $2.38 million respectively, as MetaMask responded to a security incident affecting its staking infrastructure.

On-chain vault histories from Morpho's API document the scale of the movement. The RLUSD vault declined from approximately 426.4 million RLUSD at 6 p.m. ET to 350.4 million at 10 p.m., according to Morpho's vault state records. The PayPal USD vault fell from 408.9 million PYUSD to 349.3 million over the same four-hour window.

Live snapshots retrieved around 11:11 p.m. ET showed the strain on redemption capacity. The RLUSD vault reported $349.27 million in total assets against $8.46 million in available liquidity, meaning most vault assets remain allocated to lending markets and cannot be withdrawn instantly. The PYUSD vault held $347.58 million in assets with only $2.38 million immediately accessible. Deposit-taking vaults on Morpho rely on idle liquidity to honor redemptions; thin buffers increase the likelihood that large withdrawals queue until underlying loans are recalled.

An Ethereum transaction recorded at 7:45 p.m. ET shows the RLUSD vault receiving 9.09 million RLUSD back from Morpho through its lending adapter. The funds returned to the vault itself rather than to a depositor redeeming vault shares, indicating active liquidity management during the outflow period.

Sentora describes the RLUSD vault as lending the stablecoin against collateral including Bitcoin wrappers, staked ETH and yield-bearing stablecoin derivatives. That collateral profile links the vault's risk position to Ethereum staking infrastructure — the same sector under stress on the evening of Sept. 30.

Validator Exits Add Uncertainty

The withdrawals overlapped with MetaMask's disclosure of an infrastructure security incident. MetaMask said it was proactively exiting affected validators in its non-custodial staking operations and had identified "no immediate threat to MetaMask wallets."

The Defiant previously reported that MetaMask Staking had begun exiting validators it operates within Lido. Lido said holders of its stETH token did not need to act, but warned of foregone staking rewards and possible downtime penalties while validators exit.

The timing alone does not establish causation. Morpho's hourly histories show substantial asset declines by 7 p.m. ET, before MetaMask published its 7:38 p.m. post, meaning depositors were already withdrawing before the incident became public.

MetaMask said it does not manage clients' staking withdrawal keys and would provide further updates as appropriate.

For Sentora's vaults, the operational question is whether thin liquidity buffers persist. If outflows continue, vault curators will need to recall loans or rely on adapter mechanisms to rebuild redemption capacity, while depositors face potential delays in accessing funds until validator exits tied to Lido complete and staking markets normalize.