CVE-2026-34202

Zebra node crash — V5 transaction hash panic (P2P reachable)

HIGH

7.5

CVSS Score

Published: March 31, 2026 at 02:02 PM UTC

Updated: July 24, 2026 at 09:20 PM UTC

4 products affected across 2 vendorsZebraZebra ChainZebra

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Severity

HIGH7.5

Exploit prediction

EPSS 0.8%

SSVC

No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Zebra · Zfndcargo

95%

v < 4.3.0

Affected range stops below 4.3.0, so it looks safe — our inference, not a vendor statement

Zebra Chain · Zfndcargo

95%

v < 6.0.1

Affected range stops below 6.0.1, so it looks safe — our inference, not a vendor statement

Zebra · Zcashfoundation

60%

v < 4.3.0

Affected range stops below 4.3.0, so it looks safe — our inference, not a vendor statement

Zebra Chain · Zcashfoundation

60%

v < 6.0.1

Affected range stops below 6.0.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

x_refsource_CONFIRMVendor Advisory

Source: cverecord

https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-qp6f-w4r3-h8wg

x_refsource_MISCRelease Notes

Source: cverecord

https://github.com/ZcashFoundation/zebra/releases/tag/v4.3.0

x_refsource_MISCVendor Advisory

Source: cverecord

https://zfnd.org/zebra-4-3-0-critical-security-fixes-zip-235-support-and-performance-improvements

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGH[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: NONE
Integrity: NONE
Availability: HIGH

Vector?

Quick Info

StatusANALYZED

CWE

CWE-1336CWE-94CWE-502

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