CRITICALCVE-2026-44498Published Modified CNA GitHub_M
CVE-2026-44498: ZEBRA: Block Validator Undercounts Coinbase and P2SH Sigops
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.
Metrics
- CVSS v4.0
- 9.2
- Severity
- CRITICAL
- Fixed in
- —
- Affected Products
- 1
Affected packages
- ZcashFoundation / zebra< 4.4.0
CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N