CVE-2026-109364
Medium
Description
Zebra 2.3.0 before 6.4.0 contains a protection mechanism failure that allows unauthenticated peers to evade bans because bans and misbehavior scores are keyed on exact IP addresses. Attackers can reconnect from fresh IPv6 addresses in their /64 allocation or flush the 20,000-entry FIFO ban list to restore access for banned peers.
SeverityMedium
CVSS5.3
Exploit probability—
ProductZcashfoundation Zebra
PublishedOct 12, 2026
First seenOct 12, 2026
Weakness typeCWE-693CWE-693
How to fix
Update
- ZcashFoundation zebra6.4.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| ZcashFoundation zebra | 2.3.0 ≤ v < 6.4.0 | 6.4.0 |
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