CVSS 4.0
9.2 criticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:HCVE-2026-34202
Critical (9.2) in zfnd. EPSS 0.8% chance of exploitation in the next 30 days. Fixed in zebrad 4.3.0.
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.
Severity
CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- EPSS
- 0.8% chance of exploitation in the next 30 days; higher than 56% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-502, CWE-94, CWE-1336
- Published
- Modified
- Record from
- the NVD, synced
Affected
- zfnd:zebra
- zfnd:zebra-chain
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-qp6f-w4r3-h8wg | crates.io | zebrad | <4.3.0 | 4.3.0 |
| GHSA-qp6f-w4r3-h8wg | crates.io | zebra-chain | <6.0.1 | 6.0.1 |