Multichain Says $1.4M in Ether Siphoned From Users Who Failed to Update Approvals

The cross-chain bridge urged users to remove approvals for six tokens after it was alerted to a security flaw.

AccessTimeIconJan 18, 2022 at 11:14 a.m. UTC
Updated May 11, 2023 at 3:40 p.m. UTC

Multichain users who didn't update their approvals as instructed yesterday have been exploited and have lost 445 wrapped ether ($1.4 million), the project tweeted on Tuesday.

  • On Monday, Multichain instructed its users to remove approvals for six tokens and said otherwise their assets would be exposed to a security vulnerability. The tokens in question were WETH, PERI, OMT, WBNB, MATIC and AVAX.
  • Decentralized finance security firm Dedaub first found the flaw, which Multichain said it had fixed.
  • Later on Tuesday, crypto security firm PeckShield revealed the wallet address where the stolen funds had been deposited. The address holds 455 ether as of the time of writing.
  • Because the users have to be the ones to remove the approvals, there isn't much Multichain can do, PeckShield told CoinDesk in a Twitter message.
  • Multichain, formerly Anyswap, is a cross-chain bridge which raised $60 million in December in a seed funding round that was led by Binance Labs.


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Eliza Gkritsi is CoinDesk's crypto mining reporter.

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