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OpenNMS CVE-2026-89089

| EUVDEUVD-2026-75729 MEDIUM
SQL Injection (CWE-89)
2026-09-10 OpenNMS GHSA-fcjx-6cv6-5wqj
SQLi Horizon Meridian
6.5
CVSS 3.1 · Vendor: OpenNMS
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Severity by source

Vendor (OpenNMS) PRIMARY
6.5 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
vuln.today AI
6.5 MEDIUM

REST API is network-accessible; ROLE_USER auth required (PR:L); injection is read-only (I:N/A:N); full database read including secrets justifies C:H.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (OpenNMS).

CVSS VectorVendor: OpenNMS

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

Lifecycle Timeline

2
Source Code Evidence Fetched
Sep 10, 2026 - 21:21 vuln.today
Analysis Generated
Sep 10, 2026 - 21:21 vuln.today

DescriptionCVE.org

A SQL injection vulnerability exists in the JasperReports-based reporting feature of multiple versions of OpenNMS Meridian and Horizon. A low-privileged authenticated user (ROLE_USER) can run the shipped, default-enabled online reports "Maintenance contracts expired" (AssetManagementMaintExpired) and "Maintenance contracts strategy" (AssetManagementMaintStrategy) via the reporting REST API (POST /rest/reports/{id}) and supply a DATE_FORMAT parameter that the report templates substitute literally, un-escaped, into their SQL queries. This lets an attacker execute arbitrary SQL against the OpenNMS database and read arbitrary data, including database-stored secrets such as provisioning and notification credentials and SNMP community strings.

The solution is to upgrade to Meridian 2024.3.13, 2025.0.10 and Horizon 36.0.4 or newer. Meridian and Horizon installation instructions state that they are intended for installation within an organization's private networks and should not be directly accessible from the Internet.

AnalysisAI

SQL injection in the JasperReports reporting engine of OpenNMS Meridian and Horizon allows any authenticated ROLE_USER to execute arbitrary SQL against the OpenNMS PostgreSQL database by supplying a crafted DATE_FORMAT parameter to two default-enabled asset-management reports via the REST API. The database exposure includes SNMP community strings, provisioning credentials, and notification credentials for every monitored device - high-value intelligence enabling lateral movement across the managed network. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation Exploitation requires a valid OpenNMS user account with at least ROLE_USER privileges - the lowest default role, commonly assigned to read-only staff and automated service accounts. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The vendor-assigned CVSS 6.5 with vector AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N is a well-calibrated assessment of this vulnerability. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade to OpenNMS Meridian 2024.3.13 or 2025.0.10, or OpenNMS Horizon 36.0.4 or newer, per vendor guidance reflected in GitHub PR #8832 (https://github.com/OpenNMS/opennms/pull/8832). … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-89089 vulnerability details – vuln.today
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