Bitcoin Core publicly disclosed high-severity vulnerability CVE-2025-62861 on November 10, 2026, according to Foresight News, published November 11, 2026, at 10:23:21 UTC+08:00. The reported bug could leave an affected node unable to create a miner block template—and therefore unable to produce blocks—until it restarted.
The issue involved TRUC “sibling transaction eviction” during a chain reorganization. The source says that logic was not constrained by bypass_limits: when transactions were added back, it could evict a restored transaction while leaving its descendants in the mempool. That inconsistent mempool state could cause block-template creation to fail.
The affected versions were Bitcoin Core 28.0–28.2 and 29.0–29.1. The source says a fix was released in v30.0 on October 10, 2025, and backported to the 28.x and 29.x branches. Niklas Goegge discovered and responsibly disclosed the vulnerability; Greg Sanders submitted the fix as PR #33504.