CVE-2026-123554

HighCVSS 7.5/10Last modified Nov 9, 2026

Description

Zebra zebrad 6.4.0 before 7.0.0 performs quadratic work in the mempool coinbase-maturity check because Transaction::coinbase_spend_restriction() rebuilds the transaction's output list once per spent outpoint. Any connected peer can repeatedly send unsigned transactions with many transparent inputs and outputs, which are rejected without a misbehavior score, to pin verification threads.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-407

Affected software

Vendor	Product	Versions
ZcashFoundation	zebra	>= 6.4.0, < 7.0.0

References

Timeline

Published: Nov 8, 2026
Last modified: Nov 9, 2026
NVD status: Deferred

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