Is CVE-2026-104435 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-104435?

CVE-2026-104435 has a CVSS v3 severity of HIGH (7.4).

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CVE-2026-104435

Description

Zebra zebrad 4.4.0 and zebra-script 6.0.0 fail to enforce a ZIP-244 consensus rule, accepting V5 transparent inputs signed with SIGHASH_SINGLE that lack a corresponding output. Attackers can broadcast crafted V5 transactions with more inputs than outputs that Zebra accepts but zcashd rejects, causing a network consensus split.