To generate reports, Kibana uses the Chromium web browser, which runs on the server in headless mode. Chromium is an open-source project not related to Elastic, and is embedded into Kibana. Chromium may require additional OS dependencies to run properly.

Chromium sandboxedit

For an additional layer of security, use the sandbox. The Chromium sandbox uses operating system-provided mechanisms to ensure that code execution cannot make persistent changes to the computer or access confidential information. The specific sandboxing techniques differ for each operating system.

Linux sandboxedit

The Linux sandbox depends on user namespaces, which were introduced with the 3.8 Linux kernel. However, many distributions don’t support or allow non-privileged processes to create user namespaces, or they require the CAP_SYS_ADMIN capability. The reporting features automatically disable the sandbox when it detects it is running on systems where it is not enabled. Without explicitly setting xpack.screenshotting.browser.chromium.disableSandbox: false in kibana.yml, the reporting features may detect that it can’t be enabled. In the event it is automatically disabled, you’ll see the following message in your Kibana startup logs: Chromium sandbox provides an additional layer of protection, but is not supported for your OS. Automatically setting 'xpack.screenshotting.browser.chromium.disableSandbox: true'.

Reporting automatically enables the Chromium sandbox at startup when a supported OS is detected. However, if your kernel is 3.8 or newer, it’s recommended to set xpack.screenshotting.browser.chromium.disableSandbox: false in your kibana.yml to explicitly enable the sandbox.

Dockeredit

When running Kibana in a Docker container, all container processes are run within a usernamespace with seccomp-bpf and AppArmor profiles that prevent the Chromium sandbox from being used. In these situations, disabling the sandbox is recommended, as the container implements similar security mechanisms.