Improper Certificate Validation Affecting org.opensearch.plugin:opensearch-security package, versions [2.18.0.0,2.19.4.0)[3.0.0.0,3.3.0.0)
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- published22 May 2026
- disclosed7 May 2026
- creditUnknown
Introduced: 7 May 2026
CVE NOT AVAILABLE CWE-295 (opens in a new tab)How to fix?
Upgrade org.opensearch.plugin:opensearch-security to version 2.19.4.0, 3.3.0.0 or higher.
Overview
Affected versions of this package are vulnerable to Improper Certificate Validation due to ineffective hostname verification in the TLS certificate validation. An attacker can bypass expected hostname checks by presenting a certificate signed by the trusted certificate authority but with an incorrect hostname, allowing unauthorized nodes to join the cluster.
Workaround
This vulnerability can be mitigated by using more restrictive values for plugins.security.nodes_dn to limit which certificates are accepted for node-to-node communication.