CVE-2026-104420

MEDIUMCVSS 5.3

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.

Published 2026-10-02 · last modified 2026-10-02

Full record at NVD ↗

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Ncerio by BeyondNets · data from NVD, CISA KEV, EPSS.