Vulnerability · Published Aug 18, 2026 · Assigned by Zabbix
CVE-2026-23938Server DoS via JavaScript preprocessing or script items
Low 2.1
In plain English
A low-severity security flaw in Zabbix from Zabbix. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 4.0)2.1Low
Exploit odds (30 days)0.5%top 57.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
An authenticated administrator is able to crash Zabbix server or proxy by creating specifically crafted preprocessing/script item JavaScript scripts, leading to potential denial of service.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | zabbix | no fix listed | DEBIAN-CVE-2026-23938 |
| Debian:13 | zabbix | no fix listed | DEBIAN-CVE-2026-23938 |
| Debian:14 | zabbix | 1:7.0.27+dfsg-1 | DEBIAN-CVE-2026-23938 |
| Ubuntu:26.04:LTS | zabbix | no fix listed | UBUNTU-CVE-2026-23938 |
| Ubuntu:26.10 | zabbix | no fix listed | UBUNTU-CVE-2026-23938 |
Affected products (as reported)
Weakness: CWE-248 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N