Frontend DoS via the popup.testtriggerexpr action

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-23930
StatePUBLISHED
AssignerZabbix
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-18 13:17:21 UTC
Updated2026-09-08 15:05:57 UTC
DescriptionAn unauthenticated user is able to cause disproportionate CPU load on the Frontend webserver by sending specifically crafted requests to the Frontend popup.testtriggerexpr action, leading to potential denial of service.

Risk And Classification

Primary CVSS: v4.0 5.3 MEDIUM from [email protected]

CVSS:4.0/AV:A/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

EPSS: 0.001720000 probability, percentile 0.066960000 (date 2026-09-03)

Problem Types: CWE-405 | CWE-405 CWE-405: Asymmetric Resource Consumption (Amplification)

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary5.3MEDIUMCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/C...
4.0CNACVSS5.3MEDIUMCVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
3.1[email protected]Primary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v4.0 Breakdown

Attack Vector
Adjacent
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:A/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

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Zabbix Zabbix All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Zabbix Zabbix affected 6.0.0 6.0.46 git Not specified
CNA Zabbix Zabbix affected 7.0.0 7.0.26 git Not specified
CNA Zabbix Zabbix affected 7.4.0 7.4.10 git Not specified

References

ReferenceSourceLinkTags
support.zabbix.com/browse/ZBX-28069 [email protected] support.zabbix.com Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Zabbix wants to thank barume for submitting this report on the HackerOne bug bounty platform. (en)

Additional Advisory Data

Solutions

CNA: Update the affected components to their respective fixed versions.

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