libexpat through 2.6.1 allows an XML Entity Expansion attack when there is isolated use of external parsers (created via XML_ExternalEntityParserCreate).

References

• https://nvd.nist.gov/vuln/detail/CVE-2024-28757
• libexpat/libexpat#839
• libexpat/libexpat#842
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FPLC6WDSRDUYS7F7JWAOVOHFNOUQ43DD
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LKJ7V5F6LJCEQJXDBWGT27J7NAP3E3N7
• https://security.netapp.com/advisory/ntap-20240322-0001
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VK2O34GH43NTHBZBN7G5Y6YKJKPUCTBE
• http://www.openwall.com/lists/oss-security/2024/03/15/1