libhibernate-validator-java is only used as a build dependency of libhibernate3-java. No package depends on it at runtime, so the risk of being affected by this vulnerability is rather low, if not zero.
Emmanuel Bourg __ This is the maintainer address of Debian's Java team <http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/pkg-java-maintainers>. Please use debian-j...@lists.debian.org for discussions and questions.