Bitcoin Core reveals mining bug fixed more than a year ago

One high-severity and two medium-severity flaws were patched in October 2025 and made public only after the last affected version line reached end of support Bitcoin Core has published details on three security vulnerabilities that touched miners, node operators and Tor users. Each one was quietly fixed more than a year ago. The disclosure landed on November 10, 2026. It covers one flaw rated High severity and two rated Medium . Bitcoin Core reported no active exploits for any of them. The issues only matter now for anyone still running software that should have been retired long ago. The headline issue is CVE-2025-62861 , the one rated High. It affected block template creation during chain reorganizations involving TRUC transactions. Some quick translation helps here.

BeCrypto News shows a short excerpt and links to the publisher. The full report belongs to Crypto Briefing.