{"id":"CVE-2026-109364","summary":"Zebra 2.3.0 before 6.4.0 Peer Ban Bypass via Exact-IP Keying","details":"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.","aliases":["GHSA-jhpp-8h75-7pv5"],"modified":"2026-10-13T02:46:48.577651759Z","published":"2026-10-12T16:05:42.223Z","database_specific":{"cwe_ids":["CWE-693"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109364.json","cna_assigner":"VulnCheck"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109364.json"},{"type":"ADVISORY","url":"https://github.com/ZcashFoundation/zebra/security/advisories/GHSA-jhpp-8h75-7pv5"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-109364"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/zebra-2.3.0-before-6.4.0-peer-ban-bypass-via-exact-ip-keying"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/zcashfoundation/zebra","events":[{"introduced":"b0e7fd4a9a6159c2b81976452fe368cb06d2dead"},{"fixed":"aedb094dc6dd13a0a565947e7ab4466a8b149d39"}],"database_specific":{"extracted_events":[{"introduced":"2.3.0"},{"fixed":"6.4.0"}],"source":"AFFECTED_FIELD"}}],"versions":["zebra-utils-v10.0.1","zebra-state-v13.0.0","zebra-script-v11.0.0","zebra-rpc-v16.0.0","zebra-node-services-v10.0.0","zebra-network-v12.0.0","zebra-consensus-v15.0.0","zebra-chain-v12.0.0","v6.3.0","zebra-utils-v10.0.0","zebra-state-v12.0.1","zebra-script-v10.1.2","zebra-rpc-v15.0.0","zebra-node-services-v9.1.2","zebra-network-v11.0.0","zebra-consensus-v14.0.1","zebra-chain-v11.3.0","v6.2.3","zebra-utils-v9.1.4","zebra-state-v12.0.0","zebra-rpc-v14.0.0","zebra-network-v10.2.1","zebra-consensus-v14.0.0","v6.2.2","zebra-utils-v9.1.3","zebra-state-v11.1.1","zebra-rpc-v13.0.0","zebra-consensus-v13.0.0","v6.2.1","zebra-state-v11.1.0","zebra-network-v10.2.0","zebra-consensus-v12.0.1","v6.2.0","zebra-utils-v9.1.1","zebra-state-v11.0.0","zebra-script-v10.1.1","zebra-rpc-v12.0.0","zebra-node-services-v9.1.1","zebra-network-v10.1.1","zebra-consensus-v12.0.0","zebra-chain-v11.2.0","v6.1.0","tower-fallback-v0.2.43","tower-batch-control-v1.1.1","zebra-utils-v9.1.0","zebra-state-v10.1.0","zebra-script-v10.1.0","zebra-rpc-v11.1.0","zebra-node-services-v9.1.0","zebra-network-v10.1.0","zebra-consensus-v11.0.0","zebra-chain-v11.1.0","v6.0.0","tower-fallback-v0.2.42","tower-batch-control-v1.1.0","v6.0.0-rc.0","v5.2.0","v5.1.0","v5.1.1","v5.0.0","v4.5.1","v4.5.0","v4.4.0","v4.4.1","v4.3.1","4.3.1","v4.3.0","v4.2.0","v4.1.0","v4.0.0","v3.1.0","v3.0.0","v3.0.0-rc.0","v2.5.0","v2.4.2","v2.3.0","v2.4.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-109364.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}