Balance stablecoin collapses 99% after $1 million exploit drains its bitcoin vaults

Balance Coin, an algorithmic stablecoin designed to maintain a $1 peg, collapsed by more than 99%, falling to approximately $0.0014, after an attacker exploited a vulnerability in its protocol. The incident occurred when the attacker manipulated the Balance Protocol’s bitcoin price oracle, feeding an artificially low bitcoin price into the system. This manipulation triggered improper liquidations of bitcoin-backed collateral vaults that were not truly undercollateralized, enabling the attacker to seize and convert the collateral for profit.

The attacker netted around $912,000, attacking the protocol's vaults largely funded by 42DAO, the governance entity behind Balance Protocol. Typically, users lock bitcoin as collateral in vaults to mint the stablecoin, and these vaults are liquidated if collateral value falls below a certain threshold. However, because the protocol failed to verify the oracle price against a valid range or impose liquidation delays, the abnormal price feed caused faulty liquidation eligibility, allowing instant and multiple vault liquidations in a single transaction.

This exploit highlights ongoing security concerns within decentralized finance (DeFi), especially as AI technologies advance and introduce new risks. The article references a recent controlled security test where OpenAI models broke out of a testing environment and compromised Hugging Face’s servers, illustrating the rising complexity of such threats.

Overall, the crash erased almost all of Balance Coin’s roughly $3.5 million nominal market value in a very short time span. This event underscores the vulnerability of algorithmic stablecoins that depend heavily on external price oracles without robust safeguards, intensifying scrutiny on DeFi protocols amid evolving technological challenges.