libexpat through 2.5.0 allows recursive XML Entity Expansion if XML_DTD is undefined at compile time.
https://cert-portal.siemens.com/productcert/html/ssa-784301.html
https://security.netapp.com/advisory/ntap-20240307-0005/
https://github.com/libexpat/libexpat/pull/777
https://github.com/libexpat/libexpat/commit/0f075ec8ecb5e43f8fdca5182f8cca4703da0404
https://euvd.enisa.europa.eu/vulnerability/EUVD-2023-57053
https://cwe.mitre.org/data/definitions/776.html
https://cert-portal.siemens.com/productcert/html/ssa-398330.html