TYPO3 Core

More detailed:

In the module "System › Access" there is a table of pages with permissions for Owner/Group/Everybody (see attached image).

These checkmarks/crosses are not navigable by keyboard and screenreader.

Suggestion:
They should make use of standard focusable and clickable elements <a> (okayish) or <button> (semantically better here because it triggers an action).

If really not solvable otherwise, they should at least provide the aria-role=button and manage the aria-pressed attribute which helps screenreaders. (See below for downsides)

References:
This contains some information about <button> vs. aria-role=button: https://developer.mozilla.org/en-US/docs/Web/Accessibility/ARIA/Roles/button_role

Patch set 1 for branch master of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/c/Packages/TYPO3.CMS/+/64000

Applied in changeset ee3b457d1c24c705bdd82e5b7c3670853e37b72b.