CVE-2026-23927

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Oracle TNS Connection String Injection in Zabbix Agent 2

Publication date: 2026-05-06

Last updated on: 2026-09-18

Assigner: Zabbix

Description

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.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-05-06

Last Modified

2026-09-18

Generated

2026-09-25

AI Q&A

2026-05-06

EPSS Evaluated

2026-09-24

NVD

CVE-2026-23927

EUVD

EUVD-2026-27528

Affected Vendors & Products

Vendor	Product	Version / Range
zabbix	zabbix	From 7.0.0 (inc) to 7.0.24 (exc)
zabbix	zabbix	From 7.4.0 (inc) to 7.4.8 (exc)
zabbix	zabbix	From 6.0.0 (inc) to 6.0.45 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-522	The product transmits or stores authentication credentials, but it uses an insecure method that is susceptible to unauthorized interception and/or retrieval.

Attack-Flow Graph

Executive Summary

This vulnerability allows a user who can connect to Agent 2 to inject an Oracle TNS connection string through the 'service' parameter.

As a result, Agent 2 may connect to an attacker-controlled server and leak Oracle database credentials if those credentials are saved in a named session.

Impact Analysis

The vulnerability can lead to unauthorized disclosure of Oracle database credentials.

An attacker could exploit this to gain access to sensitive database information by causing Agent 2 to connect to a malicious server.

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