CVE-2026-34202

Name: CVE-2026-34202
Creator: NVD / NIST
Published: 2026-03-31T15:16:17.86+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.2/10EPSS 0.73%

Last modified Jun 17, 2026

CVE-2026-34202 is a critical-severity vulnerability rated 9.2/10 on the CVSS scale. ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.0 and zebra-chain version 6.0.1, a vulnerability in Zebra's transaction processing logic allows a remote, unauthenticated attacker to cause a Zebra node to panic (crash). EPSS estimates a 0.73% chance of exploitation in the next 30 days.

Description

ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.0 and zebra-chain version 6.0.1, a vulnerability in Zebra's transaction processing logic allows a remote, unauthenticated attacker to cause a Zebra node to panic (crash). This is triggered by sending a specially crafted V5 transaction that passes initial deserialization but fails during transaction ID calculation. This issue has been patched in zebrad version 4.3.0 and zebra-chain version 6.0.1.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS 4.0

9.2/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.73%

49.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Zfnd	Zebra	< 4.3.0
Zfnd	Zebra-Chain	< 6.0.1

References

https://github.com/ZcashFoundation/zebra/releases/tag/v4.3.0Release Notes
https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-qp6f-w4r3-h8wgVendor Advisory
https://zfnd.org/zebra-4-3-0-critical-security-fixes-zip-235-support-and-performance-improvementsVendor Advisory

Timeline

Published: Mar 31, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-34202?

How severe is CVE-2026-34202?

CVE-2026-34202 has a CVSS score of 9.2/10 (CRITICAL severity). The EPSS model estimates a 0.73% probability of exploitation in the next 30 days.

How do I fix CVE-2026-34202?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-34202?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST