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.

CVSS Vector

References

• https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-pvmv-cwg8-v6c8
• https://www.vulncheck.com/advisories/zebra-4.4.0-consensus-divergence-via-v5-sighash-single-without-output