Zebra has Consensus Divergence in Transparent Sighash Hash-Type Handling due to Stale Buffer
Zebra has Consensus Divergence in Transparent Sighash Hash-Type Handling due to Stale Buffer. The fix for https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-8m29-fpq5-89jj introduced a separate issue due to insuficient error handling of the case where the sighash type is invalid, during sighash computation.
Vuln-watch · relayed from the GitHub Advisory Database; see Source & attribution below
Summary
The fix for https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-8m29-fpq5-89jj introduced a separate issue due to insuficient error handling of the case where the sighash type is invalid, during sighash computation.
Affected
- zebra-script (rust) <= 5.0.1 — fixed in 6.0.0
- zebrad (rust) < 4.4.0 — fixed in 4.4.0
Severity
Critical (CVSS 9.3), as rated by the upstream advisory.
Recommended actions
- Upgrade zebra-script to 6.0.0 or later
- Upgrade zebrad to 4.4.0 or later
Source & attribution
This 0xCERT advisory summarises GHSA-gq4h-3grw-2rhv / CVE-2026-44497 from the GitHub Advisory Database, credited upstream to sangsoo-osec: https://github.com/advisories/GHSA-gq4h-3grw-2rhv. Details may change; refer to the original source for the authoritative record.
References
OpenPGP-signed. The signed text of this advisory verifies against the 0xCERT key CCC7 D9EC 9415 723D.
Published 2026-05-07 · last updated 2026-10-08
curl -s https://www.0xcert.com/pgp.asc | gpg --import && curl -s https://www.0xcert.com/advisory/0xCERT-2026-0193/signed.txt | gpg --verify