CVE-2026-109364

MEDIUMCVSS 5.3

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.

Timeline

Published:October 12th, 2026 5:17 PM

Last modified:October 15th, 2026 8:31 PM

CVSS Scoring

CVSS v3: 5.3 (MEDIUM)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Weaknesses (CWE)

CWE-693

References & Reports

Advisories, patches, and third-party reports

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

Source: NIST NVD · Data may lag official sources by up to one minute