CVE-2026-23938Network attack vector

Service crash via JavaScript preprocessing or script items

Published Aug 18, 2026 · Updated Aug 18, 2026

Denial of service in Zabbix before 6.0.47, 7.0.27, and 7.4.11 allows remote authenticated users to crash the service with crafted JavaScript items. Public detail stops at the JavaScript execution path: Zabbix states that preprocessing or script item code can trigger an uncaught exception, but it has not disclosed the specific function or patch diff. Reachability is limited to a regular administrator account, and the disclosed impact is a server or proxy crash rather than data disclosure or modification.

CVSS severity2.1
Low
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Zabbix before 6.0.47, 7.0.27, and 7.4.11 allows remote authenticated users to crash the service with crafted JavaScript items. Public detail stops at the JavaScript execution path: Zabbix states that preprocessing or script item code can trigger an uncaught exception, but it has not disclosed the specific function or patch diff. Reachability is limited to a regular administrator account, and the disclosed impact is a server or proxy crash rather than data disclosure or modification.

The record

CVE
CVE-2026-23938
Published
Aug 18, 2026
Updated
Aug 18, 2026
Vendor
Zabbix
Product
Zabbix
Classifications
CWE-248, T1499
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Aug 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.0.0 <=6.0.46 changes=[{"at":"6.0.47","status":"unaffected"}]
  2. Affected versionversion=7.0.0 <=7.0.26 changes=[{"at":"7.0.27","status":"unaffected"}]
  3. Affected versionversion=7.4.0 <=7.4.10 changes=[{"at":"7.4.11","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Zabbix · Zabbixversion=6.0.0 <=6.0.46 changes=[{"at":"6.0.47","status":"unaffected"}]; version=7.0.0 <=7.0.26 changes=[{"at":"7.0.27","status":"unaffected"}]; version=7.4.0 <=7.4.10 changes=[{"at":"7.4.11","status":"unaffected"}]

Published CVSS scores

2.1ZabbixCVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-248Uncaught Exception
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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