CVE-2026-104420

MediumCVSS 5.3/10Last modified Oct 6, 2026

Description

Zebra before 6.3.0 contains a protection mechanism failure that allows unauthenticated peers to evade misbehavior scoring by supplying invalid gossiped blocks. The inbound cleanup step wrongly downcasts RouterError to VerifyBlockError and discards the score, so attackers can repeatedly force block download and Equihash verification without being banned.

Metrics

CVSS 3.1 5.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Weakness enumeration

CWE-704

Affected software

No affected versions have been published.

Timeline

Published
Oct 2, 2026
Last modified
Oct 6, 2026
NVD status
Deferred

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