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PatchSiren cyber security CVE debrief

CVE-2026-23935 Zabbix CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-18T13:17:21.843Z and has not been modified since then. This vulnerability affects Zabbix installations, specifically through a flaw in script item/preprocessing (JavaScript) HttpRequest logic. The vulnerability could potentially lead to confidentiality loss if exploited. Zabbix administrators and users should review the CVE record and vendor guidance for remediation steps. The official CVE Program record and NVD vulnerability detail page provide limited information; additional context may be found in the Zabbix support reference ZBX-28073.

Vendor
Zabbix
Product
Unknown
CVSS
MEDIUM 6.8
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 and users, security teams monitoring for potential confidentiality loss in Zabbix installations, and IT teams responsible for maintaining Zabbix servers. These stakeholders should be aware of the vulnerability's potential impact on confidentiality and take steps to review and apply vendor remediation. Additionally, security teams should assess their current monitoring and detection capabilities for Zabbix-related issues.

Technical summary

Zabbix administrator can read out of bounds memory via flaw in script item/preprocessing HttpRequest logic, potentially leading to confidentiality loss. This issue arises from inadequate input validation in the HttpRequest logic used within Zabbix's script items and preprocessing steps. The flaw may allow an attacker to access sensitive information. Reviewing and applying vendor remediation is crucial to mitigate potential risks.

Defensive priority

Medium-severity vulnerability in Zabbix, potentially allowing confidentiality loss via script item/preprocessing HttpRequest logic flaw.

Recommended defensive actions

  • Review and apply vendor remediation for Zabbix vulnerability
  • Conduct inventory checks for affected Zabbix installations
  • Implement compensating controls to monitor and restrict access to Zabbix

Evidence notes

Official CVE Program record and NVD vulnerability detail page provide limited information; primary source is Zabbix support reference ZBX-28073. The Zabbix support ticket ZBX-28073 offers additional context on the vulnerability. However, details on affected versions, patch availability, and specific attack scenarios are not provided. Defenders should verify Zabbix installations for potential exposure and review vendor guidance for remediation steps.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-23935 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-23935

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

  • CVE-2026-23935 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-23935

    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.