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CVE-2026-41583— ZEBRA: Consensus Divergence in Transparent Sighash Hash-Type Handling

Quick assessment

Affected
ZcashFoundation zebra
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

zebra是Zcash Foundation开源的一个用Rust编写的Zcash全节点实现。 zebra 4.3.1之前版本存在安全漏洞，该漏洞源于未验证V5交易的sighash哈希类型以及V4交易使用规范哈希类型，可能导致共识分裂。

AI Predicted 7.5 Difficulty: Trivial EPSS 0.47% · P39

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
ZcashFoundation zebra zebrad < 4.3.1 affected
zebra-script < 5.0.2 affected
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I. Basic Information for CVE-2026-41583

Vulnerability Information
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Vulnerability Title
ZEBRA: Consensus Divergence in Transparent Sighash Hash-Type Handling
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
调用者对规范的不恰当使用
Source: CVE Program / CVE List V5
Vulnerability Title
zebra 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
zebra是Zcash Foundation开源的一个用Rust编写的Zcash全节点实现。 zebra 4.3.1之前版本存在安全漏洞，该漏洞源于未验证V5交易的sighash哈希类型以及V4交易使用规范哈希类型，可能导致共识分裂。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ZcashFoundation zebra zebrad < 4.3.1 -

II. Public POCs for CVE-2026-41583

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III. Intelligence Information for CVE-2026-41583

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Vendor Advisories for CVE-2026-41583 (1)

Same Patch Batch · ZcashFoundation · 2026-05-08 · 7 CVEs total

CVE-2026-44500 5.3 MEDIUM ZEBRA: Allocation Amplification in Inbound Network Deserializers
CVE-2026-41585 ZEBRA: Denial of Service via Interrupted JSON-RPC Requests from Authenticated Clients
CVE-2026-41584 ZEBRA: rk Identity Point Panic in Transaction Verification
CVE-2026-44497 ZEBRA: Consensus Divergence in Transparent Sighash Hash-Type Handling due to Stale Buffer
CVE-2026-44498 ZEBRA: Block Validator Undercounts Coinbase and P2SH Sigops
CVE-2026-44499 ZEBRA: Permanent Block Discovery Halt via Gossip Queue Saturation and Syncer Poisoning

IV. Related Vulnerabilities

Same product: zebra
Same vendor: ZcashFoundation
Same weakness: CWE-573

V. Comments for CVE-2026-41583

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