CVE-2026-19135

Published: Ago 13, 2026 Last Modified: Ago 13, 2026
ExploitDB:
Other exploit source:
Google Dorks:
MEDIUM 5,4
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: low
User Interaction: none
Scope: unchanged
Confidentiality: low
Integrity: low
Availability: none

Description

AI Translation Available

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.

470

Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')

Draft
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Integrity Confidentiality Availability Other
Potential Impacts:
Execute Unauthorized Code Or Commands Alter Execution Logic Dos: Crash, Exit, Or Restart Other Read Application Data
Applicable Platforms
Languages: Java, PHP, Interpreted
View CWE Details
https://github.com/OpenNMS/opennms/pull/8754
https://github.com/OpenNMS/opennms/pull/8754