CVE-2026-40880 Zebra: Cached Mempool Verification Bypasses Consensus Rules for Ahead-of-Tip Blocks

ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.1 and zebra-consensus version 5.0.2, a logic error in Zebra's transaction verification cache could allow a malicious miner to induce a consensus split. By carefully submitting a transaction that is valid for height H+1 bu...