CVE-2026-111252

A denial of service vulnerability exists in the XML parsing of multiple versions of OpenNMS Meridian and Horizon. OpenNMS parsed XML without an effective limit on entity expansion. A document with a DOCTYPE that declares internal entities can expand to a very large value and exhaust the server...

CVE-2026-111235

An authorization bypass vulnerability exists in the REST API of multiple versions of OpenNMS Meridian and Horizon. The /rest/ Spring Security filter chains authorize requests with intercept-url rules that name the HTTP method as an uppercase token, compare the method case-sensitively, and have no...

CVE-2026-111252 OpenNMS denial of service via XML entity expansion

A denial of service vulnerability exists in the XML parsing of multiple versions of OpenNMS Meridian and Horizon. OpenNMS parsed XML without an effective limit on entity expansion. A document with a DOCTYPE that declares internal entities can expand to a very large value and exhaust the server...

CVE-2026-111252 OpenNMS denial of service via XML entity expansion

A denial of service vulnerability exists in the XML parsing of multiple versions of OpenNMS Meridian and Horizon. OpenNMS parsed XML without an effective limit on entity expansion. A document with a DOCTYPE that declares internal entities can expand to a very large value and exhaust the server...

CVE-2026-111252 OpenNMS denial of service via XML entity expansion

A denial of service vulnerability exists in the XML parsing of multiple versions of OpenNMS Meridian and Horizon. OpenNMS parsed XML without an effective limit on entity expansion. A document with a DOCTYPE that declares internal entities can expand to a very large value and exhaust the server...

CVE-2026-111252

A denial of service vulnerability exists in the XML parsing of multiple versions of OpenNMS Meridian and Horizon. OpenNMS parsed XML without an effective limit on entity expansion. A document with a DOCTYPE that declares internal entities can expand to a very large value and exhaust the server...

CVE-2026-111235 OpenNMS REST authorization bypass via non-canonical HTTP method

An authorization bypass vulnerability exists in the REST API of multiple versions of OpenNMS Meridian and Horizon. The /rest/ Spring Security filter chains authorize requests with intercept-url rules that name the HTTP method as an uppercase token, compare the method case-sensitively, and have no...

CVE-2026-111235 OpenNMS REST authorization bypass via non-canonical HTTP method

An authorization bypass vulnerability exists in the REST API of multiple versions of OpenNMS Meridian and Horizon. The /rest/ Spring Security filter chains authorize requests with intercept-url rules that name the HTTP method as an uppercase token, compare the method case-sensitively, and have no...

CVE-2026-111235 OpenNMS REST authorization bypass via non-canonical HTTP method

An authorization bypass vulnerability exists in the REST API of multiple versions of OpenNMS Meridian and Horizon. The /rest/ Spring Security filter chains authorize requests with intercept-url rules that name the HTTP method as an uppercase token, compare the method case-sensitively, and have no...

CVE-2026-111235

An authorization bypass vulnerability exists in the REST API of OpenNMS Meridian and Horizon . The flaw occurs because the Spring Security filter chains for /rest/** use case-sensitive rules for uppercase HTTP methods and lack a terminal deny rule. Consequently, using a non-canonical (e.g., lower...

EUVD-2026-102324

An authorization bypass vulnerability exists in the REST API of multiple versions of OpenNMS Meridian and Horizon. The /rest/ Spring Security filter chains authorize requests with intercept-url rules that name the HTTP method as an uppercase token, compare the method case-sensitively, and have no...

PT-2026-115200

Name of the Vulnerable Software and Affected Versions OpenNMS Meridian versions prior to 2024.3.14, 2025.0.11, and 2026.0.1 OpenNMS Horizon versions prior to 36.0.5 Description An authorization bypass exists in the REST API due to improper configuration of Spring Security filter chains. The /rest...

CVE-2026-111235: Missing Authorization

An authorization bypass vulnerability exists in the REST API of multiple versions of OpenNMS Meridian and Horizon. The /rest/ Spring Security filter chains authorize requests with intercept-url rules that name the HTTP method as an uppercase token, compare the method case-sensitively, and have no...

CVE-2026-111252: Improper Restriction of Recursive Entity References in DTDs

A denial of service vulnerability exists in the XML parsing of multiple versions of OpenNMS Meridian and Horizon. OpenNMS parsed XML without an effective limit on entity expansion. A document with a DOCTYPE that declares internal entities can expand to a very large value and exhaust the server...

PT-2026-115201

A denial of service vulnerability exists in the XML parsing of multiple versions of OpenNMS Meridian and Horizon. OpenNMS parsed XML without an effective limit on entity expansion. A document with a DOCTYPE that declares internal entities can expand to a very large value and exhaust the server...

CVE-2026-89089

A SQL injection vulnerability exists in the JasperReports-based reporting feature of multiple versions of OpenNMS Meridian and Horizon. A low-privileged authenticated user ROLEUSER can run the shipped, default-enabled online reports "Maintenance contracts expired" AssetManagementMaintExpired and...

CVE-2026-89089

A SQL injection vulnerability exists in the JasperReports-based reporting feature of multiple versions of OpenNMS Meridian and Horizon. A low-privileged authenticated user ROLEUSER can run the shipped, default-enabled online reports "Maintenance contracts expired" AssetManagementMaintExpired and...

CVE-2026-89089 OpenNMS SQL injection in shipped Asset Management JasperReports via the DATE_FORMAT parameter (ROLE_USER)

A SQL injection vulnerability exists in the JasperReports-based reporting feature of multiple versions of OpenNMS Meridian and Horizon. A low-privileged authenticated user ROLEUSER can run the shipped, default-enabled online reports "Maintenance contracts expired" AssetManagementMaintExpired and...

EUVD-2026-75729

A SQL injection vulnerability exists in the JasperReports-based reporting feature of multiple versions of OpenNMS Meridian and Horizon. A low-privileged authenticated user ROLEUSER can run the shipped, default-enabled online reports "Maintenance contracts expired" AssetManagementMaintExpired and...

CVE-2026-89054

A missing authorization vulnerability in OpenNMS Horizon allows configuration changes without authentication. The Spring Security policy for the /api/v2 REST API defines authorization rules for every HTTP method except PATCH, so the shipped @PATCH configuration endpoints for event configuration a...