Agent 2 Oracle plugin TNS connection string injection via the 'service' parameter

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Summary

CVECVE-2026-23927
StatePUBLISHED
AssignerZabbix
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-06 08:16:02 UTC
Updated2026-05-06 08:16:02 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v4.0 5.1 MEDIUM from [email protected]

CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:L/VA:N/SC:H/SI:H/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

Problem Types: CWE-522 | CWE-522 CWE-522: Insufficiently Protected Credentials

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary5.1MEDIUMCVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:L/VA:N/SC:H/SI:H/SA:N/E:X/C...
4.0CNACVSS5.1MEDIUMCVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:L/VA:N/SC:H/SI:H/SA:N

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
High
User Interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Sub Conf.
High
Sub Integrity
High
Sub Availability
None

CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:L/VA:N/SC:H/SI:H/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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Zabbix Zabbix affected 6.0.0 6.0.44 git Not specified
CNA Zabbix Zabbix affected 7.0.0 7.0.23 git Not specified
CNA Zabbix Zabbix affected 7.4.0 7.4.7 git Not specified

References

ReferenceSourceLinkTags
support.zabbix.com/browse/ZBX-27759 [email protected] support.zabbix.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Zabbix wants to thank kelsier from clocktwice.com for submitting this report on the HackerOne bug bounty platform. (en)

Additional Advisory Data

Solutions

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

Workarounds

CNA: Don't use named sessions for Oracle database monitoring.

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