Bitcoin developer proposes BIP-54 upgrade to address network vulnerabilities

Bitcoin developer Matt Corallo has estimated an 80% chance that BIP-54, a proposed upgrade known as the Great Consensus Cleanup, will become the network’s next soft fork. Co-authored with developer Antoine Poinsot, the proposal aims to resolve four longstanding technical vulnerabilities: mining difficulty adjustments, block validation, Merkle tree proofs, and duplicate coinbase transactions.

Corallo described the vulnerabilities as genuine concerns that need addressing rather than immediate existential threats. The upgrade is designed as a soft fork, which allows for backward-compatible rule changes where upgraded nodes enforce tighter rules while older nodes continue to function without a chain split.

While there is no confirmed activation date, estimates from developers suggest the upgrade could arrive in 2027, 2028, or later. The proposal is viewed by some as a way to prioritize protocol maintenance and clear technical debt, potentially rebuilding the consensus process for future upgrades.