CVE-2026-23921
Blind, read-only SQL injection in Zabbix API via sortfield parameter
Description
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.
INFO
Published Date :
March 24, 2026, 7:16 p.m.
Last Modified :
March 25, 2026, 3:41 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | HIGH | 72de3e22-0555-4a0d-ae81-9249e0f0a1e8 | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update Zabbix to the latest version.
- Apply relevant security patches.
- Restrict API access to trusted users.
- Monitor database logs for suspicious queries.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-23921.
| URL | Resource |
|---|---|
| https://support.zabbix.com/browse/ZBX-27640 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-23921 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-23921
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-23921 vulnerability anywhere in the article.
-
Daily CyberSecurity
High-Severity strongSwan Flaw Enables Remote VPN Gateway Crashes
A high-severity security vulnerability has been uncovered in strongSwan, the widely used open-source IPsec-based VPN solution. The flaw, tracked as CVE-2026-25075 with a CVSSv4 score of 8.7, resides i ... Read more
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Daily CyberSecurity
Zabbix API Vulnerability: High-Severity SQL Injection Threatens Network Monitoring Security
A high-severity security vulnerability has been identified in the Zabbix API, a popular open-source monitoring solution used by enterprises worldwide to track the status of network services, servers, ... Read more
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Daily CyberSecurity
Hackers Actively Exploiting 9.8 Critical RCE Flaw in Kali Forms WordPress Plugin
The attackers begin actively exploiting a critical vulnerability in Kali Forms, a popular drag-and-drop form builder WordPress plugin. With over 10,000 active installations, the plugin is a favorite f ... Read more
The following table lists the changes that have been made to the
CVE-2026-23921 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Mar. 24, 2026
Action Type Old Value New Value Added Description 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. Added CVSS V4.0 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 Added CWE CWE-89 Added Reference https://support.zabbix.com/browse/ZBX-27640