The solution is to upgrade to Meridian 2024.3.12, 2025.0.9 and Horizon 36.0.3 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.
Analysis and contextual insights are available on OpenCVE Cloud.
Vendor Solution
Upgrade to Meridian 2024.3.12, 2025.0.9 and Horizon 36.0.3 or newer.
Tracking
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No advisories yet.
| Link | Providers |
|---|---|
| https://github.com/OpenNMS/opennms/pull/8754 |
|
Thu, 13 Aug 2026 13:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Thu, 13 Aug 2026 10:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Opennms
Opennms horizon Opennms meridian |
|
| Vendors & Products |
Opennms
Opennms horizon Opennms meridian |
Thu, 13 Aug 2026 05:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | A JEXL expression sandbox bypass exists in multiple versions of OpenNMS Meridian and Horizon. A low-privileged authenticated user can submit a crafted expression to the Measurements REST API that escapes the sandbox and loads arbitrary Java classes on the server. This can potentially allow an attacker to gain access to confidential information and compromise integrity. The solution is to upgrade to Meridian 2024.3.12, 2025.0.9 and Horizon 36.0.3 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. | |
| Title | OpenNMS JEXL sandbox bypass in Measurements REST API allows ROLE_USER to load arbitrary classes | |
| Weaknesses | CWE-470 | |
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: OpenNMS
Published:
Updated: 2026-08-13T13:02:21.227Z
Reserved: 2026-08-06T16:14:32.586Z
Link: CVE-2026-19135
Updated: 2026-08-13T13:02:16.485Z
Status : Received
Published: 2026-08-13T05:17:22.750
Modified: 2026-08-13T13:17:48.510
Link: CVE-2026-19135
No data.
OpenCVE Enrichment
Updated: 2026-08-13T09:47:22Z