CVE-2026-109364
Zebra 2.3.0 before 6.4.0 Peer Ban Bypass via Exact-IP Keying
- State
- Published
- Severity
- 6.9 Medium
- Published
- Oct 12, 2026
- Updated
- Oct 13, 2026
- Reserved
- Oct 12, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 5.3 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N | VulnCheck |
Weaknesses
- CWE-693 Protection Mechanism Failure
Affected Products
| Product | Versions |
|---|---|
zebraZcashFoundation |
|
References
- GitHub Security Advisory (GHSA-jhpp-8h75-7pv5)vendor-advisory
- VulnCheck Advisory: Zebra 2.3.0 before 6.4.0 Peer Ban Bypass via Exact-IP Keyingthird-party-advisory
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