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K9 Finance offers a $23,000 bounty after a $2.4 million exploit on the Shibarium bridge

Context and Impact

An exploit targeting the Shibarium bridge resulted in the loss of approximately $2.4 million in assets locked on Shiba Inu’s layer-2 network. According to reports from news.bitcoin.com, the attack took place on a Saturday in September 2025 and involved compromised validator signing keys combined with a flash loan—a type of uncollateralized loan repaid within the same transaction—to manipulate the bridge’s state.

The stolen assets included 224.57 ETH, 92.6 billion SHIB, and roughly $700,000 worth of KNINE tokens. The use of flash loans allowed the attacker to execute the heist rapidly, avoiding typical liquidation windows and limiting immediate market reaction.

On-chain Response and Implications

In response, K9 Finance DAO offered a $23,000 bounty for information and blacklisted the attacker’s address—a move aimed at preventing further conversion or liquidation of stolen KNINE tokens. While these actions demonstrate governance responsiveness, they also underscore the challenges of securing decentralized systems after an exploit.

The incident highlights ongoing vulnerabilities in cross-chain bridges, particularly those relying on validator-based security models. The concentration of signing authority or weak access controls can significantly increase attack surfaces. This event may prompt projects to reevaluate key management practices, introduce more robust auditing mechanisms, and strengthen preventive safeguards rather than relying solely on reactive measures.

Although K9 Finance’s bounty and blacklisting help contain short-term damage, full recovery of stolen funds remains uncertain. The broader community will be watching for further developments—particularly around improved validator security, audit results, and any efforts toward fund restitution—as these will shape confidence in Shibarium and similar cross-chain systems moving forward.

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