The remote API at /job/(job-name)/api contained information about upstream and downstream projects. This included information about tasks that the current user otherwise has no access to, e.g. due to lack of Job/Read permission.
Created jenkins tracking bugs for this issue:
Affects: fedora-all [bug 1558871]
Openshift Enterprise now uses Jenkins 2.89.2. Marking as not affected.
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):