{"id":"UBUNTU-CVE-2026-59969","details":"(Apache ZooKeeper quorum TLS fails to enforce peer hostname verificatio ...)","modified":"2026-09-21T10:00:41.623927645Z","published":"2026-09-17T00:00:00Z","upstream":["CVE-2026-59969"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-59969"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-59969"}],"affected":[{"package":{"name":"zookeeper","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/zookeeper?arch=source&distro=esm-infra-legacy%2Ftrusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.4.5+dfsg-1","3.4.5+dfsg-1ubuntu0.1~esm1","3.4.5+dfsg-1ubuntu0.1~esm3"],"ecosystem_specific":{"binaries":[{"binary_name":"libzookeeper-java","binary_version":"3.4.5+dfsg-1ubuntu0.1~esm3"},{"binary_version":"3.4.5+dfsg-1ubuntu0.1~esm3","binary_name":"libzookeeper-mt2"},{"binary_name":"libzookeeper-st2","binary_version":"3.4.5+dfsg-1ubuntu0.1~esm3"},{"binary_version":"3.4.5+dfsg-1ubuntu0.1~esm3","binary_name":"libzookeeper2"},{"binary_name":"python-zookeeper","binary_version":"3.4.5+dfsg-1ubuntu0.1~esm3"},{"binary_version":"3.4.5+dfsg-1ubuntu0.1~esm3","binary_name":"zookeeper"},{"binary_name":"zookeeper-bin","binary_version":"3.4.5+dfsg-1ubuntu0.1~esm3"},{"binary_name":"zookeeperd","binary_version":"3.4.5+dfsg-1ubuntu0.1~esm3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59969.json"}},{"package":{"name":"zookeeper","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/zookeeper?arch=source&distro=esm-apps%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.4.6-8","3.4.7-1","3.4.8-1","3.4.8-1ubuntu0.1~esm1","3.4.8-1ubuntu0.1~esm2"],"ecosystem_specific":{"binaries":[{"binary_version":"3.4.8-1ubuntu0.1~esm2","binary_name":"libzookeeper-java"},{"binary_name":"libzookeeper-mt2","binary_version":"3.4.8-1ubuntu0.1~esm2"},{"binary_version":"3.4.8-1ubuntu0.1~esm2","binary_name":"libzookeeper-st2"},{"binary_version":"3.4.8-1ubuntu0.1~esm2","binary_name":"libzookeeper2"},{"binary_name":"python-zookeeper","binary_version":"3.4.8-1ubuntu0.1~esm2"},{"binary_name":"zookeeper","binary_version":"3.4.8-1ubuntu0.1~esm2"},{"binary_name":"zookeeper-bin","binary_version":"3.4.8-1ubuntu0.1~esm2"},{"binary_name":"zookeeperd","binary_version":"3.4.8-1ubuntu0.1~esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59969.json"}},{"package":{"name":"zookeeper","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/zookeeper?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.4.10-2","3.4.10-3","3.4.13-3","3.4.13-3ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"3.4.13-3ubuntu0.1~esm1","binary_name":"libzookeeper-java"},{"binary_version":"3.4.13-3ubuntu0.1~esm1","binary_name":"libzookeeper-mt2"},{"binary_version":"3.4.13-3ubuntu0.1~esm1","binary_name":"libzookeeper-st2"},{"binary_name":"python-zookeeper","binary_version":"3.4.13-3ubuntu0.1~esm1"},{"binary_version":"3.4.13-3ubuntu0.1~esm1","binary_name":"zookeeper"},{"binary_version":"3.4.13-3ubuntu0.1~esm1","binary_name":"zookeeper-bin"},{"binary_version":"3.4.13-3ubuntu0.1~esm1","binary_name":"zookeeperd"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59969.json"}},{"package":{"name":"zookeeper","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/zookeeper?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.4.13-1","3.4.13-3","3.4.13-3build1","3.4.13-4","3.4.13-5","3.4.13-5build1","3.4.13-5ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_version":"3.4.13-5ubuntu0.1","binary_name":"libzookeeper-java"},{"binary_name":"libzookeeper-mt2","binary_version":"3.4.13-5ubuntu0.1"},{"binary_version":"3.4.13-5ubuntu0.1","binary_name":"libzookeeper-st2"},{"binary_version":"3.4.13-5ubuntu0.1","binary_name":"python3-zookeeper"},{"binary_name":"zookeeper","binary_version":"3.4.13-5ubuntu0.1"},{"binary_version":"3.4.13-5ubuntu0.1","binary_name":"zookeeper-bin"},{"binary_version":"3.4.13-5ubuntu0.1","binary_name":"zookeeperd"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59969.json"}},{"package":{"name":"zookeeper","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/zookeeper?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.4.13-5ubuntu4","3.4.13-6ubuntu2","3.4.13-6ubuntu3","3.4.13-6ubuntu4","3.4.13-6ubuntu4.1"],"ecosystem_specific":{"binaries":[{"binary_name":"libzookeeper-java","binary_version":"3.4.13-6ubuntu4.1"},{"binary_name":"libzookeeper-mt2","binary_version":"3.4.13-6ubuntu4.1"},{"binary_version":"3.4.13-6ubuntu4.1","binary_name":"libzookeeper-st2"},{"binary_name":"python3-zookeeper","binary_version":"3.4.13-6ubuntu4.1"},{"binary_name":"zookeeper","binary_version":"3.4.13-6ubuntu4.1"},{"binary_name":"zookeeper-bin","binary_version":"3.4.13-6ubuntu4.1"},{"binary_version":"3.4.13-6ubuntu4.1","binary_name":"zookeeperd"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59969.json"}},{"package":{"name":"zookeeper","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/zookeeper?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.8.0-11","3.9.1-1","3.9.1-1build1","3.9.1-1build2"],"ecosystem_specific":{"binaries":[{"binary_name":"libzookeeper-java","binary_version":"3.9.1-1build2"},{"binary_name":"libzookeeper-mt2","binary_version":"3.9.1-1build2"},{"binary_name":"libzookeeper-st2","binary_version":"3.9.1-1build2"},{"binary_version":"3.9.1-1build2","binary_name":"python3-zookeeper"},{"binary_name":"zookeeper","binary_version":"3.9.1-1build2"},{"binary_version":"3.9.1-1build2","binary_name":"zookeeper-bin"},{"binary_version":"3.9.1-1build2","binary_name":"zookeeperd"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59969.json"}},{"package":{"name":"zookeeper","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/zookeeper?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.9.3-1build2","3.9.3-1build3","3.9.4-1","3.9.5-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libzookeeper-java","binary_version":"3.9.5-1"},{"binary_name":"libzookeeper-mt2","binary_version":"3.9.5-1"},{"binary_name":"libzookeeper-st2","binary_version":"3.9.5-1"},{"binary_version":"3.9.5-1","binary_name":"python3-zookeeper"},{"binary_name":"zookeeper","binary_version":"3.9.5-1"},{"binary_name":"zookeeper-bin","binary_version":"3.9.5-1"},{"binary_name":"zookeeperd","binary_version":"3.9.5-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-59969.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"type":"Ubuntu","score":"medium"}]}