How many DeFi hacks this week?

TLDR

One confirmed major DeFi hack was reported this week: Yearn Finances yETH pools were exploited for about $9 million per a detailed incident report in reputable media coverage.

1. The exploit involved unlimited yETH minting that drained liquidity pools, while core vaults remained unaffected per the update.
2. Broader backdrop shows elevated vulnerability, with $127 million lost in November across crypto incidents per a security summary.

Deep Dive

1. Yearn Finance Exploit

The weeks single widely reported DeFi hack is Yearn Finance (YFI), with losses estimated near $9 million.

1. Media reports outline an attack that minted near-infinite yETH and drained associated pools, with Yearn clarifying that V2 and V3 vaults were not affected in a public summary.
2. Coverage places the loss around $9 million and describes the pools targeted, consistent across mainstream crypto press reports.

2. Security Trend This Week

The surrounding news flow focused on defenses and insurance rather than multiple new DeFi hacks.

1. A new protocol introduced staking-based cover for XRP to absorb exploit shocks, pointing to maturing risk infrastructure in DeFi per the announcement.
2. Monthly data show $127 million lost to hacks and exploits in November, reinforcing that DeFi remains a prime target for attackers per a consolidated security summary.
3. Research indicates advanced AI agents can reconstruct real smart-contract exploits at low cost, potentially shortening time-to-attack as capabilities scale per a technical analysis.

Conclusion

This weeks count is one major DeFi hack, centered on Yearn Finances yETH pools. The broader context still points to elevated exploit risk and a growing emphasis on on-chain insurance and faster defenses. If you track DeFi exposure, watch protocol announcements on audits and cover, and monitor pooled derivative tokens mechanics for edge-case failures.