CVE-2026-102496: Apache XMLSchema: Denial of service through deeply nested schema structures

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

Severity: low 

Affected versions:

- Apache XMLSchema before 2.3.3

Description:

Apache XmlSchema doesn't limit how deeply schema structures can be nested when it builds its schema model, so a 
malicious schema can make parsing recurse until the stack overflows. This causes a denial of service.
Users are recommended to upgrade to version 2.3.3, which fixes this issue.

Credit:

This issue was found using Claude agents to study the security of open-source projects (finder)

References:

https://ws.apache.org/
https://www.cve.org/CVERecord?id=CVE-2026-102496