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BTCPay Server suffers critical vulnerability exploit; official team urgently requests users to upgrade and replace credentials.

2026.08.08 11:00:32

Bitcoin payment processing project BTCPay Server recently warned users of a critical, actively exploited vulnerability on its servers that could let attackers gain unauthorized access and lead to fund losses. The project posted an announcement on X, urging admins to immediately upgrade to version 2.4.2 and confirm the server footer displays the update is complete. If an upgrade cannot be done in time, officials advised users to temporarily shut down BTCPay Server to block further attacks. Additionally, BTCPay Server recommended users replace any exposed macaroon credentials, recreate the macaroons.db file, and refresh authentication strings for other Lightning Network backends. The team specifically reminded users who created hot on-chain wallets in BTCPay Server to immediately transfer funds out and re-create their wallets. To date, BTCPay Server has not disclosed the vulnerability’s specific mechanism, the attack’s start time, number of affected servers, or whether any funds have been stolen. The vulnerability was reported by a member of the Bitcoin Red Team. The incident comes as AI-assisted vulnerability mining gains attention in the crypto industry. In recent security incidents involving multiple crypto projects, researchers and firms have pointed out that AI tools are speeding up code vulnerability discovery, while also potentially being used by attackers to automate searches for security flaws.

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