Medium Key compromise Source: Crypto Briefing

MetaMask says no user funds were hit in validator security incident

MetaMask reported a security incident affecting its Ethereum validator infrastructure on September 30, 2026, leading to the diversion of approximately 0.36 ETH in staking rewards. As a precaution, around 17,000 validators holding approximately 523,000 ETH are exiting, a process expected to complete by October 7, 2026. MetaMask confirmed no user wallets or funds were compromised.

Protocols
MetaMask
Chains
Ethereum
Confidence
High
First seen
1 Oct 2026, 12:00 UTC

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