OpenSearch has ineffective TLS certificate hostname verification
Description
A regression was introduced in OpenSearch 2.18.0 that caused the plugins.security.ssl.transport.enforce_hostname_verification setting to be ineffective. When this setting was enabled, OpenSearch did not verify that the hostname in a connecting node's TLS certificate matched the hostname of the connection. This could allow a node with a valid certificate (signed by the cluster's trusted CA) but an incorrect hostname SAN to join the cluster.
Impact
Clusters running affected versions with hostname verification enabled did not receive the expected protection from this setting. A node presenting a certificate signed by the cluster's trusted CA could join the cluster regardless of whether its hostname SAN matched. This regression does not affect certificate validation itself — only the additional hostname verification check.
Patches
This issue is fixed in OpenSearch 2.19.4 and 3.3.0.
Workarounds
Use more restrictive values for plugins.security.nodes_dn to limit which certificates are accepted for node-to-node communication.
Software afectado
Haz clic en una tecnología para ver todas sus vulnerabilidades.
| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Java / Kotlin (Maven) | org.opensearch.plugin:opensearch-security | >= 2.18.0, < 2.19.4.0, >= 3.0.0, < 3.3.0.0 | 2.19.4.0, 3.3.0.0 |
Referencias
- Vector CVSS
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N- Debilidad (CWE)
CWE-295- Plataforma
- Java / Kotlin (Maven)
- Paquete
org.opensearch.plugin:opensearch-security- Publicada
- 07.05.2026
- Actualizado
- 11.10.2026 12:22
Fuentes y licencias
OSV / GitHub Advisory Database - GHSA-x5hg-x4gv-j98m - CC BY 4.0
Historial de vulnerabilidades: org.opensearch.plugin:opensearch-security
Todas las vulnerabilidades publicadas de este paquete (Java / Kotlin (Maven)), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 14
- Primera → última
- 08.2022 05.2026
- Sin corrección
- 0
- Explotada en ataques
- 0
Distribución por gravedad
- Alta 2
- Media 9
- Baja 3
Divulgaciones por año
- 2022: 1
- 2023: 7
- 2024: 0
- 2025: 2
- 2026: 4
-
OpenSearch has ineffective TLS certificate hostname verification esta entrada
Identifica las vulnerabilidades de tu aplicación
Con la integración de DockRay y el inventario de software activado, DockRay compara las versiones notificadas de los componentes con las vulnerabilidades conocidas y avisa de las coincidencias confirmadas. La cobertura depende de la tecnología compatible y de los avisos disponibles.