(An authenticated administrator is able to crash Zabbix server or proxy ...) (CVE-2026-23938)
Description
An authenticated administrator can cause a crash of the Zabbix server or proxy. This vulnerability affects multiple specific versions of Zabbix as packaged in various Ubuntu releases. The issue does not involve user interaction and requires high privileges (administrator).
CVSS v4.0
Affected software
pkg:deb/ubuntu/zabbix?arch=source&distro=esm-infra-legacy/trustypkg:deb/ubuntu/zabbix?arch=source&distro=esm-apps/xenialpkg:deb/ubuntu/zabbix?arch=source&distro=esm-apps/bionicpkg:deb/ubuntu/zabbix?arch=source&distro=esm-apps/focalpkg:deb/ubuntu/zabbix?arch=source&distro=esm-apps/jammypkg:deb/ubuntu/zabbix?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-23938 describes a vulnerability in Zabbix server or proxy where an authenticated administrator can trigger a crash, resulting in denial of service. The vulnerability affects numerous specific versions of Zabbix distributed in Ubuntu packages. The CVSS 4.0 vector indicates network attack vector, low attack complexity, privileges required at high level, no user interaction, and low impact on confidentiality, integrity, and availability. No known exploits are reported in the wild.
Potential Impact
An attacker with authenticated administrator privileges can crash the Zabbix server or proxy, causing a denial of service condition. There is no indication of data compromise or privilege escalation beyond the existing administrator level. The impact is limited to availability disruption.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch links or official fixes are provided, administrators should monitor vendor advisories for updates. Restrict administrator access to trusted personnel to reduce risk.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-23938
- Osv Schema Version
- 1.7.0
- Ecosystems
- ["Ubuntu:Pro:14.04:LTS","Ubuntu:Pro:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:Pro:22.04:LTS","Ubuntu:26.04:LTS"]
- Cvss Version
- 4.0
Threat ID: 6a870a6dacd9273b49b5896d
Added to database: 08/20/2026, 14:08:45 UTC
Last enriched: 08/20/2026, 14:24:18 UTC
Last updated: 10/05/2026, 06:48:15 UTC
Views: 33
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