---
id: CVE-2026-59783
title: >-
  The Zabbix Server/Proxy has a vulnerability where binary items can crash the
  Server/Proxy on certain NULL byte input leading to potential loss of
  availability
summary: >-
  The Zabbix Server/Proxy has a vulnerability where binary items can crash the
  Server/Proxy on certain NULL byte input leading to potential loss of
  availability. This only affects deployments where MySQL/MariaDB database is
  used as the Zab…
severity: low
cvss: 2.3
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N'
cwe:
  - CWE-787
vendor: Zabbix
product: Zabbix
affected:
  - Zabbix >= 7.0.0 <= 7.0.28
  - Zabbix >= 7.4.0 <= 7.4.12
published: '2026-10-05'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T15:27:05.657'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-59783'
references:
  - url: 'https://support.zabbix.com/browse/ZBX-28194'
    label: security@zabbix.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-59783.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-59783'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-59783'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-59783'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
  - score-dispute
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-05T11:46:36.816142Z'
cvssSource: cna
scores:
  cna: 2.3
  vendor: 6.5
ingestedAt: '2026-10-05T11:18:17.202Z'
epss: 0.00226
epssPercentile: 0.13224
---

## Overview

The Zabbix Server/Proxy has a vulnerability where binary items can crash the Server/Proxy on certain NULL byte input leading to potential loss of availability. This only affects deployments where MySQL/MariaDB database is used as the Zabbix database.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · updated 2026-10-05 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-59783.json)