According to CoinMeta, Bitcoin core developers recently disclosed three critical security vulnerabilities, including one that is considered high-risk and could affect the mining capacity of the Bitcoin network, preventing miners from creating new blocks. As per a security notice released on November 10th, these vulnerabilities impacted multiple elements of the Bitcoin core software, which supports the world's leading cryptocurrency. The vulnerability CVE-2025-62861 was rated as a high-risk issue and could lead to inconsistencies in the node memory pool after a blockchain reorganization, affecting the storage of unconfirmed transactions. This vulnerability affects Bitcoin core software versions 28.0-28.2 and 29.0-29.1, and was first reported by security researcher Niklas Goegge on September 26, 2025. In addition, developers also announced two security issues of moderate severity, namely CVE-2025-62859 and CVE-2025-62860. The former could allow malicious network participants to slow down the processing speed of Bitcoin blocks by altering transaction witness data. All of these issues were fixed in October 2025, and the relevant fixes have been integrated into Bitcoin core versions 30.0 and 29.2.