The Shiba Inu ecosystem has narrowly avoided a major setback after attackers attempted to exploit Shibarium’s bridge and drain more than $1 million worth of BONE tokens. Thanks to swift action from developers and the community, most of the funds remain secure.
Attackers Target Validator Keys
On September 13, Shiba Inu developer Kaal Dhairya confirmed the exploit wasn’t caused by a bug in Shibarium itself. Instead, attackers managed to gain control of validator keys, allowing them to temporarily push through a fraudulent transaction.
The exploit relied on a flash loan, a type of instant blockchain loan often used in sophisticated DeFi hacks. By borrowing millions of BONE tokens, the attacker gained enough validator influence to approve malicious transactions and repay the loan using stolen assets.
The hacker used a flash loan from Shibaswap for 4.6M BONE (the $1m BONE buy people were celebrating) and delegated it to win majority voting power over the validators, which allowed them to sign a malicious state on the chain.
— Buzz.eth (@buzzdefi0x) September 13, 2025
The hacker *may* have known that they compromised… https://t.co/xPBkACPI42
According to community investigator Buzz from K9 FinanceDAO, the scheme was carefully planned:
- The attacker borrowed millions of BONE via flash loan.
- They used that temporary stake to pass a fraudulent transaction.
- They siphoned funds from Shibarium’s bridge before repaying the loan.
Blockchain records show roughly 224.57 ETH and 92.6 billion SHIB were drained during the attempt. However, most of the delegated BONE tokens remained locked due to unstaking delays, giving developers time to freeze them.
Containment Measures
Developers have since suspended staking operations and moved stake manager funds to a hardware wallet secured with six-of-nine multisig protection. Dhairya emphasized these steps are temporary until new validator keys are issued and the full scope of the breach is assessed.
Attackers also attempted to sell about $700,000 worth of KNINE tokens, but that move was blocked when K9 DAO’s multisig blacklisted the wallet.
ShibaSwap Upgrade Continues
The attempted exploit coincided with the launch of a major ShibaSwap upgrade. The new version expands support beyond Ethereum to Polygon, Arbitrum, Base, and other networks, allowing direct cross-chain swaps without external bridges—a feature designed to reduce risks like the one just exposed.
Lucie, a Shiba Inu ecosystem lead, said the upgrade is a step toward positioning ShibaSwap as a multi-chain liquidity hub while preparing for deeper Shibarium integration.
“This upgrade positions ShibaSwap to attract liquidity from major blockchains while paving the way for Shibarium integration. It reinforces the Shib Ecosystem as a network that connects community culture with serious financial infrastructure,” Lucie explained.
Why It Matters
Bridge exploits remain one of the biggest security risks in crypto, with billions lost in recent years to similar attacks. While Shibarium’s core protocol held strong, the incident highlights how validator key security and governance protections are crucial for safeguarding DeFi ecosystems.
For now, Shibarium’s quick response may help preserve trust as the project pushes ahead with its multi-chain expansion.
