Input validation error in Zabbix - CVE-2026-23927
Published: May 6, 2026
Vulnerability identifier: #VU130254
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-23927
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to improper input validation in the Agent 2 Oracle plugin when processing the 'service' parameter in TNS connection strings. A remote privileged user can send a specially crafted request to disclose sensitive information.
Exploitation can cause Agent 2 to connect to an attacker-controlled server and leak Oracle database credentials if they are saved in a named session.
Affected software
Zabbix
Fedora
zabbix6.0
zabbix7.0
Fedora
zabbix6.0
zabbix7.0
How to mitigate CVE-2026-23927
Install security update from vendor's website.
Zabbix - addressed in versions 6.0.45, 7.0.24, 7.4.8
zabbix6.0 - update to 6.0.46-1.el8
zabbix7.0 - addressed in versions 7.0.26-1.el8, 7.0.26-1.el10_1, 7.0.26-1.el10_2, 7.0.26-1.el10_3
zabbix6.0 - update to 6.0.46-1.el8
zabbix7.0 - addressed in versions 7.0.26-1.el8, 7.0.26-1.el10_1, 7.0.26-1.el10_2, 7.0.26-1.el10_3