CVE-2026-41583
Zebra Vulnerable to Consensus Divergence in Transparent Sighash Hash-Type Handling
Severity by source
Trivy's own label is CRITICAL. Rated critical by NVD, GHSA.
Description
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.
Affected packages and fixed versions
| Source | Package | Fixed in |
|---|---|---|
| cargo::GitHub Security Advisory Rust | zebra-script, zebrad | 5.0.2 and 1 more |
Show all 2 entries from 1 source
| Source | Package | Fixed in |
|---|---|---|
| cargo::GitHub Security Advisory Rust | zebra-script | 5.0.2 |
| cargo::GitHub Security Advisory Rust | zebrad | 4.3.1 |