SB20260325208 - Multiple vulnerabilities in Zabbix
Published: March 25, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 vulnerabilities.
1) SQL Injection: Hibernate (CVE-ID: CVE-2026-23921)
CWE-ID: CWE-564 - SQL Injection: Hibernate
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to blind SQL injection in the Zabbix API via the sortfield parameter in include/classes/api/CApiService.php when processing API requests. A remote user can send a specially crafted API request to exfiltrate arbitrary database data through time-based techniques, potentially leading to session identifier disclosure and administrator account compromise.
Access to a Zabbix account with API access is required to exploit this vulnerability.
2) Command injection (CVE-ID: CVE-2026-23920)
CWE-ID: CWE-77 - Command injection
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote user to execute arbitrary code.
The vulnerability exists due to improper input validation in host and event action script processing when handling regex validation in multiline mode. A remote user can send a specially crafted script input containing a newline character to bypass ^ and $ anchors in administrator-defined regex patterns and inject arbitrary shell commands.
Successful exploitation requires the attacker to have script execution permissions and the target system to use ^ and $ anchors in its input validation regex.
Remediation
Install update from vendor's website.