CVE-2026-23935

Use-after-free read in script item/preprocessing HttpRequest body

Published Aug 18, 2026 CVSS 4.0 · 6.8 Medium EPSS < 1% KEV · Not listed
Description
A Zabbix administrator is able to read out of bounds memory by utilizing a flaw in script item/preprocessing (JavaScript) HttpRequest logic, leading to potential confidentiality loss.

Remediation

Vendor Solution

Update the affected components to their respective fixed versions.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:a:zabbix:zabbix:*:*:*:*:*:*:*:*
Metrics cvssV3_1

{'score': 4.9, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N'}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Zabbix
Zabbix zabbix
Vendors & Products Zabbix
Zabbix zabbix
Type Values Removed Values Added
Description A Zabbix administrator is able to read out of bounds memory by utilizing a flaw in script item/preprocessing (JavaScript) HttpRequest logic, leading to potential confidentiality loss.
Title Use-after-free read in script item/preprocessing HttpRequest body
Weaknesses CWE-125
References
Metrics cvssV4_0

{'score': 6.8, 'vector': 'CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Zabbix
Published
Updated
Aug 18, 2026, 1:34 PM
Reserved
Jan 19, 2026, 2:03 PM
Status
Analyzed
Published
Aug 18, 2026, 1:17 PM
Modified
Sep 23, 2026, 2:17 PM