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CVE-2026-23934

Frontend DoS via the validate.api.exists action

Medium5.1EPSS 0.56%
Published
Updated
Reserved
Assigned by
Zabbix

Description

An authenticated user is able to cause disproportionate CPU load on the Frontend webserver by sending specifically crafted requests to the Frontend validate.api.exists action, leading to potential denial of service.

Scores

CVSS scores of CVE-2026-23934, by who scored it
Scored byCVSSScoreVector
ZabbixCNA (assigner)4.0Medium5.1CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
NVDNVD · Analyzed4.0Medium5.1CVSS:4.0/AV:A/AC:L/AT:N/PR:L/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)
0.56% · top 54% of all CVEs (6 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.1.

Weakness

Affected products

What to do

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

References (1)

Sources

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

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Record last updated .