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CVE PROGRAM SOURCE RECORD9.2 Critical

CVE-2026-44498

ZEBRA: Block Validator Undercounts Coinbase and P2SH Sigops

Description

ZEBRA is a Zcash node written entirely in Rust. Prior to version 4.4.0, Zebra's block validator undercounts transparent signature operations against the 20000-sigop block limit (MAX_BLOCK_SIGOPS), allowing it to accept blocks that zcashd rejects with bad-blk-sigops. A miner who produces such a block can split the network: Zebra nodes follow the offending chain while zcashd nodes do not. This issue has been patched in version 4.4.0.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

ZcashFoundation zebra

  • < 4.4.0affected

References