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BTC Bitcoin approaches US$65000, as BTCPay security vulnerabilities and risk of BIP-110 fork raise market concerns
Bitcoin prices rose 0.61% to US$64986 on Saturday, approaching the key US$65000 mark. The rise comes at a time when cryptocurrency participants are highly anxious about two major security incidents: a serious exploit against BTCPay Server and uncertainty related to a possible BIP-110 protocol fork.
BTCPay major security vulnerability leads to capital outflow from Lightning Network
Late on Friday, attackers took advantage of a vulnerability in the BTCPay Server platform, widely used to process merchants 'bitcoin payments, to obtain authentication files called "macaroons" by targeting Lightning Network nodes integrated with LND software. These digital credentials give attackers the ability to control lightning nodes, close payment channels, and transfer cryptocurrency out of wallet balances.
The BTCPay development team quickly confirmed the vulnerability and urged users to immediately upgrade to version 2.4.2 or completely shut down the server to prevent further damage. The team did not disclose the scope of the vulnerability or the value of stolen assets to date.
BTCPay developers warned operators to "upgrade to v2.4.2 or shut down servers immediately" citing an active vulnerability that was draining funds in Lightning nodes.
Foundation, a major manufacturer of digital asset hardware wallets, confirmed that funds in its Lightning Node have been completely exhausted after the breach. The company reported that its standard chain hot wallets were not affected. Citadel21, a media focused on Bitcoin, also disclosed that its lightning wallet balance suffered a loss.
Despite the attack, regular on-chain wallets running over BTCPay were not affected. However, assets stored in wallets on the LND node chain may still be at risk of exposure.
Small Dictionary: BTCPay Server is an open source platform that enables merchants to directly accept Bitcoin payments without relying on intermediaries. The infrastructure can support on-chain transactions and lightning online transactions.
BIP-110 fork raises concerns about network fragmentation
Another technical challenge comes from BIP-110, a proposed Bitcoin upgrade that aims to restrict the embedding of certain types of non-transactional data into the blockchain. The activation height of BIP-110 is set to a block height of 961,632, which puts the network under strain due to the possibility of triggering chain fork and transaction replay attacks.
As of last Friday, only 2.6% of Bitcoin's computing power supports BIP-110, well below the 55% threshold required for widespread activation. Since most miners have not expressed support, client nodes running the BIP-110 protocol will automatically reject blocks that do not comply with the new rules after activation, risking splitting into competing blockchains.
If a chain fork occurs, Bitcoin holders will retain the same balance on both chains. Software developer Kevin Loaec highlighted the risks, noting that selling assets on a version without proper isolation could allow attackers to exploit replay vulnerabilities and potentially steal funds on the main chain.
Kevin Loaec emphasized that the risk is that "clearing forked assets without sequestering wallet balances could expose real bitcoin to replay attacks."
Small Dictionary: Replay attacks refer to intercepting and retransmitting valid data, thereby copying transactions on multiple blockchain forks, which may cause investors to lose money.
ETF capital inflows surge, and the number of wallets hits an annual high
Amid technological and security turmoil, institutional interest in Bitcoin has increased. Eric Balchunas, chief ETF analyst at Bloomberg, reported that U.S. spot bitcoin exchange-traded funds have attracted approximately $1 billion in net capital inflows in the past week. It was the strongest week since April this year and the third highest since October 2025.
Balchunas added that recent vulnerabilities in hardware wallet platform Coldcard may prompt some investors to switch to regulated investment products such as ETFs, although he admitted that the link remains speculative. According to reports, the Coldcard incident resulted in the theft of $116 million in Bitcoin due to a flaw in its private key generation firmware.
In addition, blockchain analytics provider Sanitation recorded a surge in the number of newly created Bitcoin wallets. In the past week, 2.27 million new wallets appeared on the chain, the highest level in a year. Sanitation pointed out that major security breaches often prompt users to create new wallets and transfer assets, triggering significant wallet activity. At the same time, increased retail participation often attracts large bitcoin holders to increase their holdings.
As of press time, the trading price of Bitcoin was US$64933, down US$74 from the closing price of the previous trading day.
