More information about this security flaw is available in the following bug: https://bugzilla.redhat.com/show_bug.cgi?id=2326998 Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
The issue was fixed in 8.4.31 and the version of jupyterlab we have in Fedora 41 has: bundled(npm(postcss)) = 8.4.31