Zebra Vulnerable to Consensus Divergence in Transparent Sighash Hash-Type Handling
Zebra Vulnerable to Consensus Divergence in Transparent Sighash Hash-Type Handling. After a refactoring, Zebra failed to validate a consensus rule that restricted the possible values of sighash hash types for V5 transactions which were enabled in the NU5 network upgrade.
Vuln-watch · relayed from the GitHub Advisory Database; see Source & attribution below
Summary
After a refactoring, Zebra failed to validate a consensus rule that restricted the possible values of sighash hash types for V5 transactions which were enabled in the NU5 network upgrade.
Affected
- zebrad (rust) < 4.3.1 — fixed in 4.3.1
- zebra-script (rust) < 5.0.2 — fixed in 5.0.2
Severity
Critical (CVSS 9.3), as rated by the upstream advisory.
Recommended actions
- Upgrade zebrad to 4.3.1 or later
- Upgrade zebra-script to 5.0.2 or later
Source & attribution
This 0xCERT advisory summarises GHSA-8m29-fpq5-89jj / CVE-2026-41583 from the GitHub Advisory Database, credited upstream to conradoplg, mpguerra, sangsoo-osec: https://github.com/advisories/GHSA-8m29-fpq5-89jj. 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 2026-04-18 · last updated 2026-10-08
curl -s https://www.0xcert.com/pgp.asc | gpg --import && curl -s https://www.0xcert.com/advisory/0xCERT-2026-0190/signed.txt | gpg --verify