Bitcoin Core developers have disclosed three vulnerabilities that were addressed in October 2025. The most critical of these, identified as CVE-2025-62861, could disrupt the mempool state following a blockchain reorganization, causing affected nodes to halt block template creation until a restart. Additionally, two other flaws were found that allowed for bypassing certain node protection mechanisms when connecting through Tor, as well as slowing down block processing. The announcement was made with a delay in line with Bitcoin Core's vulnerability disclosure policy.