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Back to active CVEs
Medium · CVSS 5.3CVE-2026-23931

Frontend plaintext macro value enumeration via the validatate.api.exists action

Answer in brief

CVE-2026-23931 records a Medium severity (CVSS 5.3) vulnerability in Frontend plaintext macro value enumeration via the validatate.api.exists action. The current sources do not mark it as known exploited. The current feed maps Zabbix/Zabbix (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 18, 2026Updated Sep 23, 2026Source checked Oct 2, 2026First seen by HOL Aug 18, 2026Material review Sep 23, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 5.3
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 5.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Zabbix/Zabbix (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
ProductAffected versionsFixed versions
cpe:2.3:a:zabbix:zabbix:*:*:*:*:*:*:*:*Not reportedNot reported
Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Zabbix/Zabbixgeneric7.4.0Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Zabbix/Zabbix.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Aug 18, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 23, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 18, 2026

Sources and claim methodology

  • Source referencesupport.zabbix.com
Upstream source description

The frontend validatate.api.exists action can be exploited by authenticated users to extract plaintext user macro values leading to potential loss of confidentiality.

Quoted source text, attributed separately from HOL analysis.

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  • Tenda AC9 POST Request fast_setting_internet_set stack-based overflowSame generic ecosystem
  • SourceCodester Student Result Management System Announcement new_announcement.php cross site scriptingSame generic ecosystem

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-203
Source
CVE List V5
Source checked
Oct 2, 2026
References
1 linked source
Open source record