Checkstyle before 8.18 loads external DTDs by default.
{ "binaries": [ { "binary_name": "checkstyle", "binary_version": "6.15-1" } ] }
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-9658.json"
{ "binaries": [ { "binary_name": "checkstyle", "binary_version": "8.8-1" } ] }