Vulnerability · Published Oct 12, 2026 · Assigned by VulnCheck
CVE-2026-109364Zebra 2.3.0 before 6.4.0 Peer Ban Bypass via Exact-IP Keying
Medium 5.3
In plain English
A medium-severity security flaw in zebra from ZcashFoundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities).
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.2%top 85.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| ZcashFoundation | zebra | 2.3.0 – before 6.4.0 |
Weakness: CWE-693 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
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 Keying third-party-advisory