CVE-2026-104431 Zebra - Denial of Service

Zebra < 6.0.0 contains a denial of service vulnerability caused by unauthenticated peers submitting mempool transactions with expensive synchronous script verification, letting attackers stall Tokio workers and render nodes unresponsive, exploit requires network access.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.34% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2 October 2026
Updated
15 October 2026
Weakness
CWE-405

Vendor fix

Update to version 6.0.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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