Security Advisory

CVE-2026-44498

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-05-08 15:09:09

Last updated 2026-05-14 21:32:52

Assigner GitHub_M

CVSS score 9.2

State PUBLISHED

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.

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