Having a dig at the CVEs, it looks like CVE-2025-27209 is specific to Node.js v24.x and CVE-2025-27210 relates to Node.js versions 20.x, 22.x, and 24.x:
The latest Kibana v8.x and v9.x look to be on 22.17.1 so I would recommend upgrading to the latest (v8.19.2 or v9.1.2). If you have any further questions feel free to reach out to security@elastic.co.
@carly.richmond can you please let us know when nodejs new version in release in 8.18.x series and also please let us know when kibana 8.19.1 is supported with 8.18.1 elasticsearch?
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