CVE-2019-9658: Improper Restriction of XML External Entity Reference

March 14, 2019 (updated September 13, 2021)

Checkstyle before 8.18 loads external DTDs by default.

References

github.com/advisories/GHSA-gp32-7h29-rpxm
github.com/checkstyle/checkstyle/issues/6474
github.com/checkstyle/checkstyle/issues/6478
github.com/checkstyle/checkstyle/pull/6476
nvd.nist.gov/vuln/detail/CVE-2019-9658

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