PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-23938 Zabbix CVE debrief

An authenticated administrator can crash the Zabbix server or proxy by creating specifically crafted preprocessing/script item JavaScript scripts, potentially leading to a denial of service. The CVE record was published on 2026-08-18T13:17:22.103Z and has not been modified since then. This vulnerability has a CVSS score of 2.1 and is considered LOW severity. Affected systems may require review and patching to mitigate potential operational impact. Zabbix administrators should assess their exposure and apply necessary updates. The CVE description indicates limited details about affected versions and patch availability, so further verification is needed to determine the scope of the vulnerability and identify potential mitigating factors.

Vendor
Zabbix
Product
Unknown
CVSS
LOW 2.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-18
Original CVE updated
2026-09-01
Advisory published
2026-08-18
Advisory updated
2026-09-01

Who should care

Zabbix administrators, security teams monitoring for potential denial of service vulnerabilities, and IT staff responsible for applying patches and managing system updates should review and assess their exposure to this vulnerability. Additionally, operators and platform administrators may need to evaluate the potential impact on their systems and take appropriate measures to mitigate the risk. Vulnerability management and security teams should prioritize this vulnerability based on its CVSS score and potential operational impact.

Technical summary

An authenticated administrator can create specifically crafted preprocessing/script item JavaScript scripts to crash the Zabbix server or proxy, potentially leading to a denial of service. The vulnerability has a CVSS score of 2.1 and is considered LOW severity.

Defensive priority

Administrators should review and restrict high-privilege user actions, monitor system logs for anomalies, and apply vendor patches when available.

Recommended defensive actions

  • Review and restrict high-privilege user actions
  • Monitor system logs for anomalies
  • Apply vendor patches when available
  • Inventory Zabbix server and proxy instances for exposure

Evidence notes

The CVE description indicates that an authenticated administrator can crash the Zabbix server or proxy using crafted JavaScript scripts. However, details about affected versions, patch availability, and potential impact are limited in the provided source corpus. Further verification is needed to determine the scope of the vulnerability and to identify any potential mitigating factors. Defenders should review the official advisory and CVE record to validate affected scope, severity, and vendor guidance.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-23938 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-23938

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-23938 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-23938

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.