CVE-2026-23938

An authenticated administrator is able to crash Zabbix server or proxy by creating specifically crafted preprocessing/script item JavaScript scripts, leading to potential denial of service.

CVSS v3 4.9 MEDIUM

4.9^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://support.zabbix.com/browse/ZBX-28075	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:zabbix:zabbix::::::::
	cpe:2.3:a:zabbix:zabbix::::::::
	cpe:2.3:a:zabbix:zabbix::::::::

History

23 Sep 2026, 15:41

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 4.9
References	~~() https://support.zabbix.com/browse/ZBX-28075 -~~	() https://support.zabbix.com/browse/ZBX-28075 - Vendor Advisory
First Time		Zabbix zabbix Zabbix
CPE		cpe:2.3:a:zabbix:zabbix::::::::

Information

Published : 2026-08-18 13:17

Updated : 2026-09-23 15:41

NVD link : CVE-2026-23938

Mitre link : CVE-2026-23938

CVE.ORG link : CVE-2026-23938

JSON object : View

Products Affected

zabbix

zabbix

CWE

CWE-248

Uncaught Exception

{"id": "CVE-2026-23938", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-23938", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-18T12:50:54.884470Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.9, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.2}], "cvssMetricV40": [{"type": "Secondary", "source": "security@zabbix.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 2.1, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "LOW", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:H/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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "HIGH", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "security@zabbix.com", "affectedData": [{"repo": "https://git.zabbix.com/", "vendor": "Zabbix", "modules": ["Server", "Proxy"], "product": "Zabbix", "versions": [{"status": "affected", "changes": [{"at": "6.0.47", "status": "unaffected"}], "version": "6.0.0", "versionType": "git", "lessThanOrEqual": "6.0.46"}, {"status": "affected", "changes": [{"at": "7.0.27", "status": "unaffected"}], "version": "7.0.0", "versionType": "git", "lessThanOrEqual": "7.0.26"}, {"status": "affected", "changes": [{"at": "7.4.11", "status": "unaffected"}], "version": "7.4.0", "versionType": "git", "lessThanOrEqual": "7.4.10"}], "defaultStatus": "unknown"}]}], "published": "2026-08-18T13:17:22.103", "references": [{"url": "https://support.zabbix.com/browse/ZBX-28075", "tags": ["Vendor Advisory"], "source": "security@zabbix.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security@zabbix.com", "description": [{"lang": "en", "value": "CWE-248"}]}], "descriptions": [{"lang": "en", "value": "An authenticated administrator is able to crash Zabbix server or proxy by creating specifically crafted preprocessing/script item JavaScript scripts, leading to potential denial of service."}], "lastModified": "2026-09-23T15:41:10.513", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:zabbix:zabbix:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "AEE8311D-7A51-44D0-844E-6D3ABF0D63BE", "versionEndExcluding": "6.0.47", "versionStartIncluding": "6.0.0"}, {"criteria": "cpe:2.3:a:zabbix:zabbix:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7C0AC5AD-2F2E-49B0-BED5-4C3896A1E529", "versionEndExcluding": "7.0.27", "versionStartIncluding": "7.0.0"}, {"criteria": "cpe:2.3:a:zabbix:zabbix:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F25E9D87-E6F2-4CB9-A284-B9881DEF3C75", "versionEndExcluding": "7.4.11", "versionStartIncluding": "7.4.0"}], "operator": "OR"}]}], "sourceIdentifier": "security@zabbix.com"}