XMLUnit for Java before 2.10.0, in the default configuration, might allow code execution via an untrusted stylesheet (used for an XSLT transformation), because XSLT extension functions are enabled.
https://github.com/advisories/GHSA-chfm-68vv-pvw5
https://github.com/xmlunit/xmlunit/issues/264
https://github.com/xmlunit/xmlunit/commit/b81d48b71dfd2868bdfc30a3e17ff973f32bc15b