libexpat through 2.6.1 allows an XML Entity Expansion attack when there is isolated use of external parsers (created via XML_ExternalEntityParserCreate).
https://www.cisa.gov/news-events/ics-advisories/icsa-24-228-06
https://security.netapp.com/advisory/ntap-20240322-0001/
https://github.com/libexpat/libexpat/pull/842