Is CVE-2026-41583 actively exploited?

No active exploitation of CVE-2026-41583 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-41583 be exploited remotely?

Yes. CVE-2026-41583 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-41583?

CVE-2026-41583 has a CVSS score of 9.1 (CRITICAL).

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CRITICAL

CVE-2026-41583

CWE-573Published: May 8, 2026· Updated: May 8, 2026

9.1

CVSS v3.1

EPSS:0.05%probability of exploitation in 30 daysPercentile:15.2th

Official 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.

NVD Source

Technical Analysis

CVE-2026-41583 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.1.