CVE-2026-109364

CVSS 6.9 (medium) · published 2026-10-12

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.

Weakness: CWE-693

Source: NVD CVE-2026-109364

References

• https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-jhpp-8h75-7pv5
• https://www.vulncheck.com/advisories/zebra-2.3.0-before-6.4.0-peer-ban-bypass-via-exact-ip-keying

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