CVE-2024-42326

Local disclosure and interruption via stale browser pointer

Published Nov 27, 2024 · Updated Nov 27, 2024

Use-after-free in browser.c in Zabbix Server 7.0.0 through 7.0.3 allows local users to disclose data or interrupt service. The vendor names es_browser_get_variant, while the published fix in es_browser_add_cookie reacquires the WebDriver object after JavaScript argument evaluation to avoid dereferencing an object freed during that evaluation. Reachability requires low-privilege local access and the server's browser-monitoring path; the published impacts are limited to low confidentiality and availability effects.

CVSS severity4.4
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in browser.c in Zabbix Server 7.0.0 through 7.0.3 allows local users to disclose data or interrupt service. The vendor names es_browser_get_variant, while the published fix in es_browser_add_cookie reacquires the WebDriver object after JavaScript argument evaluation to avoid dereferencing an object freed during that evaluation. Reachability requires low-privilege local access and the server's browser-monitoring path; the published impacts are limited to low confidentiality and availability effects.

The record

CVE
CVE-2024-42326
Published
Nov 27, 2024
Updated
Nov 27, 2024
Vendor
Zabbix
Product
Zabbix
Classifications
CWE-416, CAPEC-100
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 27, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 27, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=7.0.0 <=7.0.3 changes=[{"at":"7.0.4rc1","status":"unaffected"}]

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Zabbix · Zabbixversion=7.0.0 <=7.0.3 changes=[{"at":"7.0.4rc1","status":"unaffected"}]

Published CVSS scores

4.4ZabbixCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
CAPEC-100Overflow Buffers

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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