{"id":"UBUNTU-CVE-2026-23934","details":"An authenticated user is able to cause disproportionate CPU load on the Frontend webserver by sending specifically crafted requests to the Frontend validate.api.exists action, leading to potential denial of service.","modified":"2026-09-02T19:35:31.895167110Z","published":"2026-08-18T13:17:00Z","upstream":["CVE-2026-23934"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-23934"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-23934"}],"affected":[{"package":{"name":"zabbix","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/zabbix?arch=source&distro=esm-infra-legacy%2Ftrusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:2.0.6+dfsg-1ubuntu2","1:2.2.0+dfsg-1ubuntu1","1:2.2.0+dfsg-6ubuntu1","1:2.2.1+dfsg-1ubuntu3","1:2.2.2+dfsg-1ubuntu1","1:2.2.2+dfsg-1ubuntu1+esm1","1:2.2.2+dfsg-1ubuntu1+esm3","1:2.2.2+dfsg-1ubuntu1+esm4","1:2.2.2+dfsg-1ubuntu1+esm5"],"ecosystem_specific":{"binaries":[{"binary_name":"zabbix-agent","binary_version":"1:2.2.2+dfsg-1ubuntu1+esm5"},{"binary_name":"zabbix-frontend-php","binary_version":"1:2.2.2+dfsg-1ubuntu1+esm5"},{"binary_name":"zabbix-java-gateway","binary_version":"1:2.2.2+dfsg-1ubuntu1+esm5"},{"binary_version":"1:2.2.2+dfsg-1ubuntu1+esm5","binary_name":"zabbix-proxy-mysql"},{"binary_name":"zabbix-proxy-pgsql","binary_version":"1:2.2.2+dfsg-1ubuntu1+esm5"},{"binary_name":"zabbix-proxy-sqlite3","binary_version":"1:2.2.2+dfsg-1ubuntu1+esm5"},{"binary_name":"zabbix-server-mysql","binary_version":"1:2.2.2+dfsg-1ubuntu1+esm5"},{"binary_version":"1:2.2.2+dfsg-1ubuntu1+esm5","binary_name":"zabbix-server-pgsql"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-23934.json"}},{"package":{"name":"zabbix","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/zabbix?arch=source&distro=esm-apps%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:2.4.6+dfsg-1","1:2.4.7+dfsg-1","1:2.4.7+dfsg-2","1:2.4.7+dfsg-2ubuntu2","1:2.4.7+dfsg-2ubuntu2.1","1:2.4.7+dfsg-2ubuntu2.1+esm1","1:2.4.7+dfsg-2ubuntu2.1+esm2","1:2.4.7+dfsg-2ubuntu2.1+esm3","1:2.4.7+dfsg-2ubuntu2.1+esm4"],"ecosystem_specific":{"binaries":[{"binary_name":"zabbix-agent","binary_version":"1:2.4.7+dfsg-2ubuntu2.1+esm4"},{"binary_name":"zabbix-frontend-php","binary_version":"1:2.4.7+dfsg-2ubuntu2.1+esm4"},{"binary_version":"1:2.4.7+dfsg-2ubuntu2.1+esm4","binary_name":"zabbix-java-gateway"},{"binary_version":"1:2.4.7+dfsg-2ubuntu2.1+esm4","binary_name":"zabbix-proxy-mysql"},{"binary_version":"1:2.4.7+dfsg-2ubuntu2.1+esm4","binary_name":"zabbix-proxy-pgsql"},{"binary_version":"1:2.4.7+dfsg-2ubuntu2.1+esm4","binary_name":"zabbix-proxy-sqlite3"},{"binary_name":"zabbix-server-mysql","binary_version":"1:2.4.7+dfsg-2ubuntu2.1+esm4"},{"binary_name":"zabbix-server-pgsql","binary_version":"1:2.4.7+dfsg-2ubuntu2.1+esm4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-23934.json"}},{"package":{"name":"zabbix","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/zabbix?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:3.0.7+dfsg-3","1:3.0.12+dfsg-1","1:3.0.12+dfsg-1ubuntu0.1~esm1","1:3.0.12+dfsg-1ubuntu0.1~esm2","1:3.0.12+dfsg-1ubuntu0.1~esm3","1:3.0.12+dfsg-1ubuntu0.1~esm4"],"ecosystem_specific":{"binaries":[{"binary_name":"zabbix-agent","binary_version":"1:3.0.12+dfsg-1ubuntu0.1~esm4"},{"binary_version":"1:3.0.12+dfsg-1ubuntu0.1~esm4","binary_name":"zabbix-frontend-php"},{"binary_name":"zabbix-java-gateway","binary_version":"1:3.0.12+dfsg-1ubuntu0.1~esm4"},{"binary_name":"zabbix-proxy-mysql","binary_version":"1:3.0.12+dfsg-1ubuntu0.1~esm4"},{"binary_version":"1:3.0.12+dfsg-1ubuntu0.1~esm4","binary_name":"zabbix-proxy-pgsql"},{"binary_version":"1:3.0.12+dfsg-1ubuntu0.1~esm4","binary_name":"zabbix-proxy-sqlite3"},{"binary_version":"1:3.0.12+dfsg-1ubuntu0.1~esm4","binary_name":"zabbix-server-mysql"},{"binary_name":"zabbix-server-pgsql","binary_version":"1:3.0.12+dfsg-1ubuntu0.1~esm4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-23934.json"}},{"package":{"name":"zabbix","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/zabbix?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:4.0.4+dfsg-1build2","1:4.0.4+dfsg-1build3","1:4.0.11+dfsg-1","1:4.0.14+dfsg-1","1:4.0.15+dfsg-1","1:4.0.16+dfsg-1","1:4.0.16+dfsg-1build1","1:4.0.17+dfsg-1","1:4.0.17+dfsg-1ubuntu0.1~esm1","1:4.0.17+dfsg-1ubuntu0.1~esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"zabbix-agent","binary_version":"1:4.0.17+dfsg-1ubuntu0.1~esm2"},{"binary_name":"zabbix-frontend-php","binary_version":"1:4.0.17+dfsg-1ubuntu0.1~esm2"},{"binary_name":"zabbix-java-gateway","binary_version":"1:4.0.17+dfsg-1ubuntu0.1~esm2"},{"binary_version":"1:4.0.17+dfsg-1ubuntu0.1~esm2","binary_name":"zabbix-proxy-mysql"},{"binary_name":"zabbix-proxy-pgsql","binary_version":"1:4.0.17+dfsg-1ubuntu0.1~esm2"},{"binary_version":"1:4.0.17+dfsg-1ubuntu0.1~esm2","binary_name":"zabbix-proxy-sqlite3"},{"binary_name":"zabbix-server-mysql","binary_version":"1:4.0.17+dfsg-1ubuntu0.1~esm2"},{"binary_name":"zabbix-server-pgsql","binary_version":"1:4.0.17+dfsg-1ubuntu0.1~esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-23934.json"}},{"package":{"name":"zabbix","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/zabbix?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:5.0.8+dfsg-1build1","1:5.0.14+dfsg-1","1:5.0.17+dfsg-1","1:5.0.17+dfsg-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"1:5.0.17+dfsg-1ubuntu0.1~esm1","binary_name":"zabbix-agent"},{"binary_name":"zabbix-frontend-php","binary_version":"1:5.0.17+dfsg-1ubuntu0.1~esm1"},{"binary_name":"zabbix-java-gateway","binary_version":"1:5.0.17+dfsg-1ubuntu0.1~esm1"},{"binary_name":"zabbix-proxy-mysql","binary_version":"1:5.0.17+dfsg-1ubuntu0.1~esm1"},{"binary_version":"1:5.0.17+dfsg-1ubuntu0.1~esm1","binary_name":"zabbix-proxy-pgsql"},{"binary_version":"1:5.0.17+dfsg-1ubuntu0.1~esm1","binary_name":"zabbix-proxy-sqlite3"},{"binary_name":"zabbix-server-mysql","binary_version":"1:5.0.17+dfsg-1ubuntu0.1~esm1"},{"binary_name":"zabbix-server-pgsql","binary_version":"1:5.0.17+dfsg-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-23934.json"}},{"package":{"name":"zabbix","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/zabbix?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:7.0.10+dfsg-2build1","1:7.0.22+dfsg-1"],"ecosystem_specific":{"binaries":[{"binary_name":"zabbix-agent","binary_version":"1:7.0.22+dfsg-1"},{"binary_name":"zabbix-agent2","binary_version":"1:7.0.22+dfsg-1"},{"binary_name":"zabbix-frontend-php","binary_version":"1:7.0.22+dfsg-1"},{"binary_version":"1:7.0.22+dfsg-1","binary_name":"zabbix-java-gateway"},{"binary_name":"zabbix-proxy-mysql","binary_version":"1:7.0.22+dfsg-1"},{"binary_name":"zabbix-proxy-pgsql","binary_version":"1:7.0.22+dfsg-1"},{"binary_name":"zabbix-proxy-sqlite3","binary_version":"1:7.0.22+dfsg-1"},{"binary_name":"zabbix-sender","binary_version":"1:7.0.22+dfsg-1"},{"binary_name":"zabbix-server-mysql","binary_version":"1:7.0.22+dfsg-1"},{"binary_version":"1:7.0.22+dfsg-1","binary_name":"zabbix-server-pgsql"},{"binary_name":"zabbix-web-service","binary_version":"1:7.0.22+dfsg-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-23934.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}