CVE-2026-104420 (GCVE-0-2026-104420)
Vulnerability from cvelistv5
Published
2026-10-02 11:38
Modified
2026-10-06 02:37
Severity ?
6.9 (Medium) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CWE
  • CWE-704 - Incorrect Type Conversion or Cast
Summary
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.
References
Impacted products
Vendor Product Version
ZcashFoundation zebra Version: 0   ≤
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