Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Zfnd | Zebra | < 4.3.0 |
| Zfnd | Zebra-Chain | < 6.0.1 |
Related Weaknesses (CWE)
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-performVendor Advisory
FAQ
What is CVE-2026-34202?
CVE-2026-34202 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 at...
How severe is CVE-2026-34202?
CVE-2026-34202 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-34202?
Check the references section above for vendor advisories and patch information. Affected products include: Zfnd Zebra, Zfnd Zebra-Chain.