CVE-2026-23938

mediumpriority · track · 20EPSS 0.005 · 43 %ileNLUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.50% (43rd) EPSS

CVSS 4.9 · medium

Is it mine?

4 products

Check your exposure

Who says so?

2 sources

ncsc_nl · nvd

EPSS · scored 2026-10-27

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

Technical severity, 0–10. One row per scoring source.

4.9

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 0.5–4.9

v3.14.9mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 1.2 · impact 3.6

v3.12.7lowCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:Lsecondary · NCSC-NL NL

v4.02.1lowCVSS: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:Xsecondary · security@zabbix.com

v4.00.5lowCVSS: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:U/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:Xsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-248USCWE-248US

affected products (4)

Products and version ranges known to be affected.

Zabbix Zabbix≤ vers:unknown/*ncsc_nlNL
zabbix zabbix6.0.0 → 6.0.47nvdUScpe:2.3:a:zabbix:zabbix:*:*:*:*:*:*:*:*
zabbix zabbix7.0.0 → 7.0.27nvdUScpe:2.3:a:zabbix:zabbix:*:*:*:*:*:*:*:*
zabbix zabbix7.4.0 → 7.4.11nvdUScpe:2.3:a:zabbix:zabbix:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

NCSC-2026-0320Kwetsbaarheden verholpen in ZabbixNL2026-08-20csaf · ncsc_nlNL
Zabbix SIA heeft meerdere kwetsbaarheden verholpen in Zabbix, inclusief de API, Frontend, script item en preprocessing componenten, en de Windows Agent installer.

sources

Which sources assert this record, and when.

ncsc_nl nvd NVD CVE.org MITRE

published 2026-08-18modified 2026-09-01

references (1) nvd

External citations — patches, advisories, analysis.

https://support.zabbix.com/browse/ZBX-28075

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

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