Yeliz Akmaca 
Bitcoin-based DeFi platform Solv Protocol has confirmed that a security vulnerability in one of its vaults led to a loss of approximately $2.7 million worth of SolvBTC. While the incident affected only a limited number of users, the platform’s native asset SOLV token did not experience any significant price disruption.
Initial findings indicate that the exploit originated from the mint mechanism of a specific smart contract. The protocol team emphasized that other vaults and user assets were not affected, suggesting the vulnerability was isolated to a single component of the system.
How Did the Attack Happen?
The incident centered around one of the protocol’s BRO vaults. According to early analysis from security researchers, the attacker manipulated the token minting process through a vulnerability in the BitcoinReserveOffering contract.
The situation itself was rather unusual.
Decurity’s automated monitoring bot detected that the attacker exploited a double mint vulnerability in the contract 22 consecutive times. Within just a few transactions, the exploit unfolded as follows:
- The attacker initially minted 135 BRO tokens
- Using the vulnerability, this amount was inflated to 567 million BRO tokens
- The attacker then swapped these tokens on the market for approximately 38 SolvBTC
- As a result, the total loss was estimated at around $2.7 million.
Some security researchers have also classified the mechanism as a re-entrancy attack, a common type of exploit where unexpected callbacks in smart contracts allow attackers to manipulate token minting or asset withdrawal processes.
Number of Affected Users Remains Limited
According to information shared by the protocol team, fewer than ten users were affected by the incident.
More importantly, Solv Protocol stated that it will fully cover the loss of 38.05 SolvBTC on behalf of affected users.
The team highlighted three key points:
- The vulnerability impacted only a single vault
- All other vaults and reserves remain secure
- System updates have already been implemented to prevent similar incidents
The investigation is still ongoing. The protocol confirmed that it is working with several blockchain security firms, including Hypernative Labs, SlowMist, and CertiK, to determine the technical details of the exploit.
Incident Update: BRO Vault
A limited exploit occurred in one of our BRO vaults, affecting a very small number of users (<10).
The impacted amount is 38.0474 SolvBTC.
All other vaults and user funds remain secure and unaffected. We're actively investigating with top security…
— Solv Protocol (@SolvProtocol) March 5, 2026
10% Bounty Offered to the Hacker
Following the incident, the Solv Protocol team introduced another strategy.
The protocol offered the attacker a 10% bounty in exchange for returning the stolen funds. As part of this effort, the team publicly shared an Ethereum wallet address where the attacker could send the assets.
However, according to blockchain data, no message or transaction has yet been sent to that address.
Bitcoin DeFi Ecosystem Expands While Risks Grow
Solv Protocol is actually a major player in the Bitcoin-based decentralized finance ecosystem. The platform allows users to deposit Bitcoin and mint a synthetic asset called SolvBTC. This token can then be used across multiple blockchains for lending, staking, or providing liquidity.
According to protocol data, the platform currently holds:
24,226 BTC
Approximately $1.7 billion in reserves
However, the incident has once again raised concerns about smart contract security as the Bitcoin DeFi ecosystem continues to grow.
Crypto Attacks Continue to Reach Record Levels
In recent years, DeFi protocols have increasingly become targets of large-scale cyberattacks.
According to a report from blockchain analytics firm Chainalysis, the total volume of illicit cryptocurrency transactions reached $154 billion in 2025, marking one of the highest levels ever recorded.
Therefore, the Solv Protocol exploit is not an isolated case. Instead, it represents another example of the security challenges facing the rapidly expanding crypto financial infrastructure.
For now, the market reaction appears relatively calm. The SOLV token price remaining largely stable supports that view. However, as the investigation progresses, further technical details about the exploit are expected to emerge.
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