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PHP EUVDEUVD-2026-14955

| CVE-2026-23921 HIGH
SQL Injection (CWE-89)
2026-03-24 Zabbix
8.7
CVSS 4.0 · NVD
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Severity by source

NVD PRIMARY
8.7 HIGH
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:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
SUSE
5.3 MEDIUM
AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Primary rating from NVD.

CVSS VectorNVD

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:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

4
Patch released
Apr 09, 2026 - 20:30 nvd
Patch available
EUVD ID Assigned
Mar 24, 2026 - 19:00 euvd
EUVD-2026-14955
Analysis Generated
Mar 24, 2026 - 19:00 vuln.today
CVE Published
Mar 24, 2026 - 18:28 nvd
HIGH 8.7

DescriptionCVE.org

A low privilege Zabbix user with API access can exploit a blind SQL injection vulnerability in include/classes/api/CApiService.php to execute arbitrary SQL selects via the sortfield parameter. Although query results are not returned directly, an attacker can exfiltrate arbitrary database data through time-based techniques, potentially leading to session identifier disclosure and administrator account compromise.

AnalysisAI

A blind SQL injection vulnerability exists in Zabbix's API service layer (include/classes/api/CApiService.php) via the sortfield parameter that allows low-privilege users with API access to execute arbitrary SQL SELECT queries without direct result exfiltration. An attacker can leverage time-based blind SQL injection techniques to extract sensitive data such as session identifiers and administrator credentials, potentially leading to full administrative compromise of the Zabbix monitoring infrastructure. No CVSS score, EPSS data, or KEV status has been published, but the vulnerability's reliance on blind techniques and low-privilege requirement suggests moderate real-world exploitability.

Technical ContextAI

The vulnerability is rooted in CWE-89 (SQL Injection) and affects the PHP-based Zabbix monitoring platform (cpe:2.3:a:zabbix:zabbix). The flaw exists in the API service class (CApiService.php) where user-supplied input from the sortfield parameter is insufficiently sanitized before being incorporated into SQL queries. Because the API is accessible to low-privilege users, the attack surface is broad. The blind SQL injection nature means query results are not directly returned to the attacker; instead, exploitation requires time-based inference techniques where conditional delays in database response times reveal boolean conditions about the underlying data. This is a classic second-order or parameterized query failure where input validation and prepared statement enforcement are absent.

RemediationAI

Contact Zabbix support and retrieve the patched version from the official security advisory at https://support.zabbix.com/browse/ZBX-27640, then upgrade all Zabbix instances to the patched release immediately. As an interim measure, restrict API access to trusted networks and users only via firewall rules, implement Web Application Firewall (WAF) rules to detect and block suspicious sortfield parameters containing SQL syntax (keywords like UNION, SELECT, SLEEP, BENCHMARK), and audit API access logs for anomalous query patterns. If immediate patching is not possible, consider disabling the sortfield parameter in API calls by configuring reverse proxy rules or implementing a proxy authentication layer that strips or validates the parameter.

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Vendor StatusVendor

SUSE

Severity: Medium
Product Status
SUSE Linux Enterprise Server 12 SP5 Fixed
SUSE Linux Enterprise Server 12 SP5-LTSS Fixed
SUSE Linux Enterprise Server 12 SP5-LTSS Extended Security Fixed
SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 Fixed
SUSE Linux Enterprise Server 12 SP3-BCL Fixed

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EUVD-2026-14955 vulnerability details – vuln.today

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