Zabbix Server/Proxy Null Byte Crash via Binary Item (MySQL/MariaDB)
CVE-2026-59783 Published on October 5, 2026
Server DoS via binary items
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.
Vulnerability Analysis
CVE-2026-59783 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is a Memory Corruption Vulnerability?
The software writes data past the end, or before the beginning, of the intended buffer. Typically, this can result in corruption of data, a crash, or code execution. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent write operation then produces undefined or unexpected results.
CVE-2026-59783 has been classified to as a Memory Corruption vulnerability or weakness.
Products Associated with CVE-2026-59783
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Affected Versions
Zabbix:- Version 7.0.0, <= 7.0.28 is affected.
- Version 7.4.0, <= 7.4.12 is affected.