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Vulnerability Details :

CVE-2026-23923

Summary
Assigner-Zabbix
Assigner Org ID-72de3e22-0555-4a0d-ae81-9249e0f0a1e8
Published At-24 Mar, 2026 | 18:29
Updated At-25 Mar, 2026 | 19:25
Rejected At-
Credits

Unauthenticated arbitrary PHP class instantiation

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.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:Zabbix
Assigner Org ID:72de3e22-0555-4a0d-ae81-9249e0f0a1e8
Published At:24 Mar, 2026 | 18:29
Updated At:25 Mar, 2026 | 19:25
Rejected At:
▼CVE Numbering Authority (CNA)
Unauthenticated arbitrary PHP class instantiation

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.

Affected Products
Vendor
ZABBIXZabbix
Product
Zabbix
Repo
https://git.zabbix.com/
Modules
  • Frontend
Default Status
unknown
Versions
Affected
  • From 7.4.0 through 7.4.6 (git)
    • -> unaffectedfrom7.4.7
Problem Types
TypeCWE IDDescription
CWECWE-470CWE-470: Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')
Type: CWE
CWE ID: CWE-470
Description: CWE-470: Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')
Metrics
VersionBase scoreBase severityVector
4.06.9MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Version: 4.0
Base score: 6.9
Base severity: MEDIUM
Vector:
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Metrics Other Info
Impacts
CAPEC IDDescription
CAPEC-138CAPEC-138: Reflection Injection
CAPEC ID: CAPEC-138
Description: CAPEC-138: Reflection Injection
Solutions

Update the affected components to their respective fixed versions.

Configurations

The action can be invoked by any user able to reach Frontend.

Workarounds
Exploits
Credits
reporter
Zabbix wants to thank pitticus for submitting this report on the HackerOne bug bounty platform.
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://support.zabbix.com/browse/ZBX-27641
N/A
Hyperlink: https://support.zabbix.com/browse/ZBX-27641
Resource: N/A
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security@zabbix.com
Published At:24 Mar, 2026 | 19:16
Updated At:25 Mar, 2026 | 15:41

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary4.06.9MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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
Type: Secondary
Version: 4.0
Base score: 6.9
Base severity: MEDIUM
Vector:
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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
CPE Matches
Weaknesses
CWE IDTypeSource
CWE-470Secondarysecurity@zabbix.com
CWE ID: CWE-470
Type: Secondary
Source: security@zabbix.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://support.zabbix.com/browse/ZBX-27641security@zabbix.com
N/A
Hyperlink: https://support.zabbix.com/browse/ZBX-27641
Source: security@zabbix.com
Resource: N/A

Change History

0
Information is not available yet

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