Improper access control in Zabbix - CVE-2026-23937

Vulnerability details

The vulnerability allows a remote user to disclose sensitive information.

The vulnerability exists due to improper access control in the host.get API action when handling crafted HTTP requests to the Zabbix API. A remote user can send crafted HTTP requests to extract a host's PSK key to disclose sensitive information.

Exploitation also requires access to the Zabbix trapper port.

Affected software

How to mitigate CVE-2026-23937

External References

• https://support.zabbix.com/browse/ZBX-28074
• https://www.first.org/cvss/calculator/4-0#CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N

Related Security Bulletins

• Multiple vulnerabilities in Zabbix