Sadly, crypto hacks occur on a regular basis. Each time funds are stolen from a top-tier dApp, it turns into an enormous morale dent for customers and builders.
The Bybit hack garnered detrimental press however subsided shortly when the trade assured the group that it could proceed processing transactions whatever the $1.3 billion loss. Immediately, nonetheless, is yet one more unhappy day for Balancer and DeFi.
Earlier at present, Balancer, one of many OG DeFi protocols, was hit (once more), and the outcomes are dangerous, not for the dapp however for the complete DeFi scene and Ethereum layer-2s. Earlier than at present, Balancer managed over $775 million, however the protocol is shortly bleeding.
We’re conscious of a possible exploit impacting Balancer v2 swimming pools.
Our engineering and safety groups are investigating with excessive precedence.
We’ll share verified updates and subsequent steps as quickly as we now have extra info.
— Balancer (@Balancer) November 3, 2025
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Balancer Hack: Over $120M And Rising Misplaced
To grasp what’s occurring, we should first know what Balancer does.
For rookies, Balancer is a decentralized automated market maker (AMM) protocol on Ethereum. From the dapp, builders on different Ethereum-compatible chains also can construct programmable liquidity options.
That you could fork Balancer V2’s code is a bonus. Should you don’t have liquidity, you possibly can provide property and permit customers to commerce them whereas incomes a yield from any customized liquidity pool straight from Balancer.
However right here’s the issue: Balancer solely relied on a single core contract to handle all vaults. The design was meant to spice up fuel effectivity, however this turned the one largest flaw, now affecting not solely Balancer but in addition all different deployments that relied on its code.
Here is every little thing it is advisable to know in regards to the Balancer Hack:
1. The assault focused Balancer’s V2 vaults and liquidity swimming pools, exploiting a vulnerability in sensible contract interactions. Preliminary evaluation from on-chain investigators factors to a maliciously deployed contract that… pic.twitter.com/udAM4hB0OD
— Adi (@AdiFlips) November 3, 2025
The hacker focused the “manageUserBalance” operate, successfully taking on vault withdrawals whereas bypassing sender validation. Up to now, over $128 million have been drained from vaults throughout a number of chains, together with Berachain.
Replace: @Balancer and its forks are underneath assault, with complete losses throughout a number of chains reaching ~$128.64M up to now. https://t.co/67XGX5RcRR pic.twitter.com/FIwx20ALSz
— PeckShieldAlert (@PeckShieldAlert) November 3, 2025
The loss will doubtless develop as a result of after the hacker drained Balancer swimming pools on Ethereum, the layer-1, the subsequent targets have been bridged equivalents on layer-2s, that’s, wrapped tokens. What that is creating is a “domino impact” the place a protocol utilizing Balancer v2 code, particularly if it’s a layer-2, has to pause operations till the flaw has been mounted.
Balancer v2 (+forks) exploited for over $100M+TLDR:
Balancer v2 and it is forks are affected:• ETH → balancer → 70m• Arbitrum → balancer → 6m• Base → balancer → 4m• @SonicLabs → beets → 3.4m• OP → beets → 283k• Polygon → balancer → 117k
Exploiter is… pic.twitter.com/yTTtrS5L3S
— Blub🤖 (@DeFi_Blub) November 3, 2025
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Berachain Halts Chain
Out of warning, Berachain, which is meant to reflect the Ethereum mainnet and run 24/7, has been paused.
In a publish on X, the group mentioned its validators have “coordinated” purposefully to halt the platform as they scramble to carry out an emergency arduous fork with the intention to tackle the Balancer hack.
The Berachain validators have coordinated to purposefully halt the Berachain community because the core group performs an emergency arduous fork to handle Balancer V2 associated exploits on the BEX.
This halt has been executed purposefully, and the community shall be operational shortly upon…
— Berachain Basis 🐻⛓ (@berachain) November 3, 2025
They’re additionally conscious that some is probably not completely happy, however their main goal is to guard over $12M of person funds.
Beefy, a yield optimizer, has additionally paused all merchandise linked to Balancer.
Balancer V2 Exploit:
All Beefy Balancer V2 merchandise are paused. Our group is monitoring the scenario intently.
We are going to cooperate to make sure all losses are correctly captured, and that Beefy customers take part totally in any restoration.
Our full assist to the @Balancer group. pic.twitter.com/eC2JCkldRz
— Beefy (@beefyfinance) November 3, 2025
In addition they promise to cooperate and be sure that all losses are correctly accounted for.
The query now could be: Will different protocols, most of them being DEXes, observe swimsuit? On Beets DEX, there are over $6.6M in complete worth locked (TVL), for example, and that is simply one of many over 20 platforms which have forked Balancer V2’s code.
(Supply: DeFiLlama)
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Balancer Hack Over $128M Misplaced, Berachain Halts
Balancer is an DeFi OG
Protocol managed over $700M earlier than hack
Over $128M withdrawn after sensible contract exploit
Berachain validators take warning, pause chain
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