Add as a preferred source on GoogleBitcoin Core Flaw Can Halt Block Template Creation After Reorganization
The flaw affects Bitcoin Core 28.0 through 28.2 and 29.0 through 29.1. Fixed releases appeared in October 2025, more than a year before the details became public.
Bitcoin Core disclosed a vulnerability that can leave affected nodes unable to create block templates after a chain reorganization, with a restart needed before template creation resumes.
Identified as CVE-2025-62861, the flaw affects Bitcoin Core versions 28.0 through 28.2 and 29.0 through 29.1. A mempool inconsistency after a reorganization may prevent an affected node from creating templates until it is restarted.
Security researcher Niklas Goegge discovered the flaw. Fixed releases were published in October 2025, more than a year before Bitcoin Core made the vulnerability details public Tuesday, Nov. 10, 2026.
Simon Yoon
ReporterSimon Yoon reports on blockchain technology for TokenPost. Send corrections or tips to info@tokenpost.com.