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CVE-2026-59783— Server DoS via binary items

Quick assessment

Affected
Zabbix Zabbix
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Zabbix Server/Proxy 存在一个漏洞，当接收到包含空字节（NULL byte）的特定输入时，二进制类型的项目（binary items）可能导致 Server/Proxy 崩溃，从而引发可用性损失。此漏洞仅在使用 MySQL/MariaDB 数据库作为 Zabbix 数据库的部署环境中受到影响。

CVSS 2.3 · Low

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2026-59783

Vulnerability Information
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Vulnerability Title
Server DoS via binary items
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Zabbix Zabbix 7.0.0 ~ 7.0.28 -

II. Public POCs for CVE-2026-59783

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III. Intelligence Information for CVE-2026-59783

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Other References for CVE-2026-59783 (1)

Same Patch Batch · Zabbix · 2026-10-05 · 6 CVEs total

CVE-2026-59782 6.9 MEDIUM JavaScript preprocessing memory disclosure
CVE-2026-59786 6.9 MEDIUM Active agent heartbeat missing TLS check
CVE-2026-59788 5.6 MEDIUM Stored XSS vulnerability in OAuth configuration form
CVE-2026-59787 5.3 MEDIUM SNMP trap injection in zabbix_trap_receiver.pl
CVE-2026-59785 5.1 MEDIUM Hidden host credentials inferable via multiselect.get filtering

IV. Related Vulnerabilities

Same product: Zabbix
Same vendor: Zabbix
Same weakness: CWE-787

V. Comments for CVE-2026-59783

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