Yearn's yETH Stableswap Pool Exploited for $9 Million in Complex Attack
Yearn's yETH Stableswap Pool Exploited for $9 Million in Complex Attack
馃捀 Yearn's $9M Problem
Yearn Finance suffered a $9 million exploit on November 30 at 21:11 UTC targeting the yETH stableswap pool.
Damage breakdown:
- $8M lost from the impacted stableswap pool
- $0.9M from the yETH-WETH pool on Curve
- Total: $9 million
The attack involved minting large amounts of yETH through a vulnerability in custom stableswap code. Yearn V2/V3 vaults remain unaffected and secure.
Response efforts:
- War room activated with SEAL911 and ChainSecurity
- Full postmortem investigation underway
- Complexity similar to recent Balancer hack
Yearn emphasized that no other products use similar code to the exploited contract. The team is conducting thorough analysis and will implement lessons learned.
Affected users can seek assistance through Yearn's Discord support. The protocol maintains detailed security documentation covering audit history and vulnerability disclosure processes.
At 21:11 UTC on Nov 30, an incident occurred involving the yETH stableswap pool that resulted in the minting of a large amount of yETH. The contract impacted is a custom version of popular stableswap code, unrelated to other Yearn products. Yearn V2/V3 vaults are not at risk.
We are investigating an incident involving the yETH LST stableswap pool. Yearn Vaults (both V2 and V3) are not affected.
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