# DeFi security incidents on Base network

> Live situation record from CLSTR: https://clstr.news/situations/defi-security-incidents-on-base-network
> Updated: 2026-10-25T11:21:35.000Z. Sources: 2. Developments: 2.

The Base network has experienced multiple decentralized finance (DeFi) security incidents involving significant asset losses.

In early October, an unnamed DeFi vault suffered an exploit resulting in a loss of over $6 million. The attacker reportedly gained access by adding a new contract to the vault’s whitelist to borrow aBaswstETH and transfer tokens to a controlled address. Security firms estimated the loss at approximately 1,783 wstETH, though no evidence suggested breaches of Aave or Base core systems.

Later in the month, a separate incident was flagged involving a loss of $721,140. While the specific protocol and exploit vector remained unconfirmed, some signals suggested a potential connection to a Cysic cross-chain bridge event.

## Timeline

### 2026-10-25: Base network reports $721,140 loss in suspected DeFi incident

Security monitor PeckShieldAlert flagged a reported $721,140 loss on the Base network, though the specific cause and affected protocols remain unconfirmed.

2 sources. https://clstr.news/cluster/base-network-reports-721140-loss-in-suspected-defi-incident

### 2026-10-03: Base DeFi vault loses over $6 million in exploit

An attacker exploited a whitelist vulnerability in a DeFi vault on the Base network, draining over $6 million in wstETH assets.

7 sources. https://clstr.news/cluster/base-defi-vault-loses-over-6-million-in-exploit

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Cite as: DeFi security incidents on Base network. CLSTR, https://clstr.news/situations/defi-security-incidents-on-base-network