CVE-2026-104420
MEDIUM
NVD
CVSS Score
5.3
Severity
MEDIUM
Published
Oct 02, 2026
Vendor
unknown
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.