Zabbix up to 7.4.6 Frontend validate externally-controlled input to select classes or code

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.3$0-$5k1.04

Summaryinfo

A vulnerability was found in Zabbix up to 7.4.6. It has been rated as problematic. Affected is the function validate of the component Frontend. The manipulation leads to use of externally-controlled input to select classes or code. This vulnerability is referenced as CVE-2026-23923. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in Zabbix up to 7.4.6. It has been rated as problematic. This issue affects the function validate of the component Frontend. The manipulation with an unknown input leads to a use of externally-controlled input to select classes or code vulnerability. Using CWE to declare the problem leads to CWE-470. The product uses external input with reflection to select which classes or code to use, but it does not sufficiently prevent the input from selecting improper classes or code. Impacted is availability. The summary by CVE is:

An unauthenticated attacker can exploit the Frontend 'validate' action to blindly instantiate arbitrary PHP classes. The impact depends on environment setup but appears limited at this time.

It is possible to read the advisory at support.zabbix.com. The identification of this vulnerability is CVE-2026-23923 since 01/19/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-14956). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Use of externally-controlled input to select classes or code
CWE: CWE-470
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

01/19/2026 CVE reserved
03/24/2026 +64 days Advisory disclosed
03/24/2026 +0 days VulDB entry created
03/29/2026 +5 days VulDB entry last update

Sourcesinfo

Advisory: support.zabbix.com
Status: Confirmed

CVE: CVE-2026-23923 (🔒)
GCVE (CVE): GCVE-0-2026-23923
GCVE (VulDB): GCVE-100-352835
EUVD: 🔒

Entryinfo

Created: 03/24/2026 20:47
Updated: 03/29/2026 06:47
Changes: 03/24/2026 20:47 (65), 03/24/2026 21:44 (1), 03/29/2026 06:47 (1)
Complete: 🔍
Cache ID: 216:4BF:103

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