How severe is CVE-2026-34202?

CVE-2026-34202 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-34202 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-34202?

CVE-2026-34202 primarily affects Zfnd Zebra. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-34202?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-34202 have an EU (EUVD) identifier?

Yes. CVE-2026-34202 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-17453.

When was CVE-2026-34202 published?

CVE-2026-34202 was published on 2026-03-31 and last updated on 2026-06-17.

CVE-2026-34202

CVE-2026-34202 is a high-severity vulnerability in Zfnd Zebra with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-502.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 9.2
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-17453
Weakness: CWE-502
Affected product: Zfnd Zebra
Published: 2026-03-31
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-34202?: 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.
How severe is CVE-2026-34202?: CVE-2026-34202 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-34202 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-34202?: CVE-2026-34202 primarily affects Zfnd Zebra. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-34202?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-34202 have an EU (EUVD) identifier?: Yes. CVE-2026-34202 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-17453.
When was CVE-2026-34202 published?: CVE-2026-34202 was published on 2026-03-31 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:zfnd:zebra:*:*:*:*:*:rust:*:*
cpe:2.3:a:zfnd:zebra-chain:*:*:*:*:*:rust:*:*

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