High severity7.4NVD Advisory· Published Oct 2, 2026

CVE-2026-104437

Description

Zebra before 4.4.0 contains a consensus divergence vulnerability in V5 transparent signature verification, computing a ZIP-244 digest for SIGHASH_SINGLE inputs lacking corresponding outputs instead of failing. Attackers can craft V5 transactions with fewer outputs than inputs that Zebra accepts and templates via getblocktemplate, producing blocks zcashd rejects.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Zebra/zebradllm-fuzzy
Range: <4.4.0
ZcashFoundation/Zebrallm-fuzzy
Range: <4.4.0

Patches

Vulnerability mechanics

References

github.com/ZcashFoundation/zebra/security/advisories/GHSA-cwfq-rfcr-8hmpnvd
www.vulncheck.com/advisories/zebra-before-4.4.0-consensus-split-via-sighash-single-missing-output-handlingnvd

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