Bitcoin Lightning Network Nodes Affected, BTCPay Announces Emergency Patch 2.4.2

cryptonews.ruPublished on 2026-08-07Last updated on 2026-08-07

Abstract

Bitcoin's ecosystem faces another security incident. The open-source, self-hosted cryptocurrency payment processor BTCPay Server is under an active attack exploiting a critical vulnerability that can lead to loss of funds, as reported by the Bitcoin Red Team. The BTCPay team urgently advises all users to immediately update to version 2.4.2. If an immediate update isn't possible, they recommend disabling the server until it can be updated. Users must also refresh server authentication files and move funds from any "hot" wallets generated by BTCPay. At least two incidents of stolen funds have been confirmed, affecting nodes from Foundation's Zac Herbert and the Lightning Citadel 21 node. Observers note that these targeted attacks on tools like Coldcard and BTCPay Server seem aimed at the core of Bitcoin's enthusiast community.

The Bitcoin ecosystem has faced another attack on self-hosting infrastructure services following the recent Coldcard hack, which reportedly resulted in the theft of over 1,700 $BTC according to Galaxy Research.

BTCPay Server, an open-source, self-hosted cryptocurrency payment processor, announced it is facing an ongoing attack by unknown threat actors targeting its codebase.

On social media, the BTCPay Server team emphasized that "a critical vulnerability in BTCPay Server is being actively exploited, which can lead to loss of funds."

This vulnerability was reported by the Bitcoin Red Team — a volunteer group of security experts who, following the Coldcard hack, have already discovered thousands of vulnerabilities in hundreds of open-source projects.

"Please update your BTCPay Server to version 2.4.2 by going to the 'Admin Dashboard' -> 'Server' -> 'Maintenance' -> 'Update' and confirming that version 2.4.2 is displayed in the footer. If you cannot update immediately, shut down your BTCPay Server to prevent unauthorized access until you can perform the update," the BTCPay Server team advised.

Furthermore, the project's developers urged users to update the macaroons and macaroons.db — two key server files; update authentication strings; and move any funds if they are stored in a hot wallet generated by BTCPay.

Although details of this vulnerability have not been publicly disclosed, at least two instances of fund theft are known. Zack Herbert, co-founder and CEO of Foundation, the developer of the Passport Prime device, reported that their node was drained overnight.

Hodlonaut also discovered that funds from the Lightning Citadel 21 node were stolen, noting that it did not hold many funds due to precautions related to the potential activation of BIP-110.

He emphasized that this attack appears to be targeted and aimed at the "heart" of the Bitcoin social layer. "Coldcard and BTCPayserver. These are tools for enthusiasts and hardcore users, used by people who live and breathe Bitcoin. This doesn't look like a coincidence," he concluded.

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Related Questions

QWhat is the main subject of the security alert in the Bitcoin ecosystem according to the article?

AThe article reports on a critical vulnerability being actively exploited in BTCPay Server, an open-source, self-hosted cryptocurrency payment processor, which could lead to loss of funds.

QWhat specific action does the BTCPay Server team recommend to users to protect themselves?

AThe BTCPay Server team recommends that users immediately update their server to version 2.4.2. If an immediate update is not possible, they should shut down their BTCPay Server to prevent unauthorized access until they can update.

QWhich security group reported the vulnerability in BTCPay Server?

AThe vulnerability was reported by the Bitcoin Red Team, a volunteer group of security experts.

QWhat are two examples of fund theft mentioned as a result of the exploited vulnerability?

ATwo examples are: 1) Zach Herbert's node (co-founder of Foundation, maker of Passport Prime) was drained overnight. 2) Funds were stolen from the Lightning Citadel 21 node, as discovered by Hodlonaut.

QAccording to Hodlonaut, what makes this attack particularly concerning for the Bitcoin community?

AHodlonaut suggests the attack appears targeted at the 'heart' of Bitcoin's social layer, as it exploits tools like Coldcard and BTCPay Server that are used by dedicated enthusiasts and hardcore users who live and breathe Bitcoin, indicating it was not random.

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1.6k Total ViewsPublished 2025.05.13Updated 2025.05.13

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