Checkstyle before 8.18 loads external DTDs by default.
Created checkstyle tracking bugs for this issue:
Affects: fedora-all [bug 1694858]
checkstyle-8.0-4.1.fc28 has been pushed to the Fedora 28 stable repository. If problems still persist, please make note of it in this bug report.
checkstyle-8.0-4.1.fc29 has been pushed to the Fedora 29 stable repository. If problems still persist, please make note of it in this bug report.
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.