CVE-2026-23930

Frontend DoS via the popup.testtriggerexpr action

5.3MediumCVSS base score
0.63%Exploitation in 30 daysEPSS · top 49% of all CVEs
NoKnown exploitednot in CISA's KEV catalog
NonePublic exploitsnone known yet

Description

An unauthenticated user is able to cause disproportionate CPU load on the Frontend webserver by sending specifically crafted requests to the Frontend popup.testtriggerexpr action, leading to potential denial of service.

Timeline

2026
19 Jan 2026
19 Jan 2026
ID reserved
By Zabbix
18 Aug 20267 months later
18 Aug 2026· 7 months later
Published

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2026-23930, by who scored it
Scored by	CVSS	Score	Vector
ZabbixCNA (assigner)	4.0	Medium5.3	CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
NVDNVD · Analyzed	4.0	Medium5.3	CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS (exploitation in 30 days): 0.63% · top 49% of all CVEs (11 Nov 2026)
CISA SSVC: Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.

Affected products

Zabbix · Zabbix
- affected 6.0.0 – ≤ 6.0.46
- affected 7.0.0 – ≤ 7.0.26
- affected 7.4.0 – ≤ 7.4.10

What to do

Solution: Update the affected components to their respective fixed versions.

References1

https://support.zabbix.com/browse/ZBX-28069 (opens in a new tab)

Sources

The same CVE in the primary databases and aggregators, to check against.

Badge for a README or a ticket

[![CVE-2026-23930](https://cveledger.app/badge/CVE-2026-23930.svg)](https://cveledger.app/cve/CVE-2026-23930)

Record last updated 18 Aug 2026, 13:35 UTC.