CVE-2026-41583ZEBRA: Consensus Divergence in Transparent Sighash Hash-Type Handling
Updated under an hour ago ()
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It affects ZcashFoundation zebra and 2 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.1 and prior to zebra-script version 5.0.2, 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. Zebra nodes could thus accept and eventually mine a block that would be considered invalid by zcashd nodes, creating a consensus split between Zebra and zcashd nodes. In a similar vein, for V4 transactions, Zebra mistakenly used the "canonical" hash type when computing the sighash while zcashd (correctly per the spec) uses the raw value, which could also crate a consensus split. This issue has been patched in zebrad version 4.3.1 and zebra-script version 5.0.2.
- CVSS
- 9.3 CRITICAL (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H
- Weakness (CWE)
- CWE-573
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- May 8, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
ZcashFoundation zebra zcashfoundation:zebra (from the name) | zebrad < 4.3.1; zebra-script < 5.0.2 | CNA record |
zfnd zebra-script zfnd:zebra-script | before 5.0.2 | NVD |
zfnd zebrad zfnd:zebrad | before 4.3.1 | NVD |
References
- https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-8m29-fpq5-89jjx-refsource-confirm, vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.