---
id: CVE-2026-23927
title: >-
  A user able to connect to Agent 2 can inject an Oracle TNS connection string
  via the 'service' parameter
summary: >-
  A user able to connect to Agent 2 can inject an Oracle TNS connection string
  via the 'service' parameter. This can lead to Agent 2 connecting to an
  attacker-controlled server and leaking Oracle database credentials if they are
  saved in a…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N'
cwe:
  - CWE-522
vendor: zabbix
product: zabbix
affected:
  - 'zabbix >= 6.0.0, < 6.0.45'
  - 'zabbix >= 7.0.0, < 7.0.24'
  - 'zabbix >= 7.4.0, < 7.4.8'
patched:
  - zabbix 7.4.8
published: '2026-05-06'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T15:26:56.730'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-23927'
references:
  - url: 'https://support.zabbix.com/browse/ZBX-27759'
    label: security@zabbix.com
tags:
  - nvd
epss: 0.00222
epssPercentile: 0.13085
ingestedAt: '2026-09-18T15:44:31.551Z'
---

## Overview

A user able to connect to Agent 2 can inject an Oracle TNS connection string via the 'service' parameter. This can lead to Agent 2 connecting to an attacker-controlled server and leaking Oracle database credentials if they are saved in a named session.

## Affected

- `zabbix >= 6.0.0, < 6.0.45`
- `zabbix >= 7.0.0, < 7.0.24`
- `zabbix >= 7.4.0, < 7.4.8`

## Remediation

Upgrade past the affected range:

- `zabbix 7.4.8`