Incident All ledgers
Cork V1: $12.0m
Cork V1 lost $12.0m on 28 May 2025. Ranked 173rd of 1,272 crypto failures, with method, returned funds and comparable incidents.
- Date
- 28 May 2025
- Lost
- $12.0m
- Returned or repaid
- None recorded
- Target
- DeFi Protocol
- Category
- Access Control
- Method
- Improper Access Control
- Chains
- Ethereum
Cork Protocol lost about $12 million on May 28, 2025, when an attacker exploited an unprotected beforeSwap hook and weak market and token validation to create fake token derivatives, draining 3,761 wstETH.
Against the ledger
- It ranks 173rd of the 1,272 incidents with a known loss, and 18th in 2025.
- It accounts for 4.8% of the $251.7m in known losses in May 2025.
- 225 incidents in the ledger are classified as Access Control, for $1.96bn in total. This one is 0.6% of that.
- The ledger records no returned funds.
Closest in size by the same method
| Date | Target | Lost | Type | Method | Returned |
|---|---|---|---|---|---|
| 27 Feb 2021 | Furucombo | $14.0m | DeFi Protocol | Delegatecall Hijack | — |
| 06 Aug 2024 | Ronin Bridge | $12.0m | DeFi Protocol | Uninitialized Proxy | — |
| 22 Sept 2025 | UXLINK | $11.3m | DeFi Protocol | Delegatecall Hijack | — |
| 02 Jun 2019 | Kraken | $10.4m | CEX | Improper Access Control | — |
| 08 May 2021 | Rari Capital | $10.0m | DeFi Protocol | Arbitrary External Call | — |
All failures in 2025 · The failures ledger
Amounts are DefiLlama’s estimates and can change as incidents are revalued. Its returned figure can include money a company repaid itself, not only funds recovered from attackers. Source: DefiLlama.
Cite this Bitminer.io, “Cork V1, failures ledger”, data to 2 November 2026, https://bitminer.io/ledger/incident/cork-v1-2025-05-28/. How this is built