bitcoinNovember 12, 2026
Bitcoin Core discloses three vulnerabilities fixed in October
Bitcoin Core developers have published details of three vulnerabilities that were fixed back in October 2025. The most serious one, CVE-2025-62861, could disrupt the mempool state after a blockchain reorganization, causing the affected node to stop producing block templates until it was restarted.
The other two bugs allowed certain node protection mechanisms to be bypassed for connections over Tor and slowed down block processing.
The information was released with a delay, in line with Bitcoin Core's vulnerability disclosure policy.
For those who hold or exchange cryptocurrency, this means the fixes were already part of the October update, and nodes updated to it are not exposed to the described issues.