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CVE-2026-123555

8.7 highEPSS 0.4%

High (8.7) in zcashfoundation zebra. EPSS 0.4% estimated probability of exploitation activity in the next 30 days.

On this page
Zebra from 2.3.0 before 7.0.0 contains a denial of service vulnerability that allows unauthenticated peers to evade misbehavior scoring by sending transactions or blocks with invalid transparent scripts. Attackers can flood mempool with script-failing transactions or serve forged v5 block bodies with altered scriptSig bytes to exhaust CPU and repeatedly stall block sync.

Severity

CVSS 4.0

8.7 high
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

7.5 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
0.4% estimated probability of exploitation activity in the next 30 days; 38th percentile. Scored 2026-11-10. A forecast for this CVE across the internet, not for your own systems.
CWE
CWE-755 Improper Handling of Exceptional Conditions
OWASP Top 10
A10:2025 Mishandling of Exceptional Conditions
Published
Modified
NVD analysis
Deferred: the NVD does not plan to analyze it
Record from
the NVD, synced

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Affected

Versions

From the CNA's record in the CVE List.

ProductAffected
ZcashFoundation zebrafrom 2.3.0 before 7.0.0
ZcashFoundation zebrafrom 1.0.0-beta.46 before 18.0.0

References

Check your stackJSON