CVE-2026-123555: Zebra 2.3.0 before 7.0.0 Denial of Service via Unscored Script Verification Failures
ZcashFoundation · zebra
Fixed in 7.0.0 · Affected: ZcashFoundation zebra before 7.0.0 · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 37% of scored CVEs
DescriptionCVE.org
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.
Affected products2
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- ZcashFoundation · zebrafrom 2.3.0 before 7.0.0
- ZcashFoundation · zebrafrom 1.0.0-beta.46 before 18.0.0
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- ZcashFoundation
- Published
- November 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-123555 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.