CVE-2026-49875: Apache CXF: XML External Entity (XXE) Injection in W3CMultiSchemaFactory and EndpointReferenceUtils

[Colm O hEigeartaigh <coheigea () apache org>]

Severity: important 

Affected versions:

- Apache CXF (org.apache.cxf:cxf-core) 4.2.0 before 4.2.2
- Apache CXF (org.apache.cxf:cxf-core) before 4.1.7

Description:

Apache CXF's EndpointReferenceUtils and W3CMultiSchemaFactory classes construct a SAXParserFactory without the 
necessary JAXP hardening configurations, enabling out-of-band (OOB) 
external entity resolution. Users are recommended to upgrade to versions 4.2.2 or 4.1.7, which fix this issue.

Credit:

Venkatraman Kumar (r3dw0lfsec), Securin (finder)

References:

https://cxf.apache.org/
https://www.cve.org/CVERecord?id=CVE-2026-49875