CVE-2026-102497 — Apache XMLSchema: Denial of service through cyclic schema definitions in the schema walker

CVE-2026-102497

Apache XMLSchema: Denial of service through cyclic schema definitions in the schema walker PUBLISHED

Description (CNA)

The Apache XmlSchema walker (xmlschema-walker) doesn't detect cycles in type derivation, substitution groups, model groups or attribute groups. A malicious schema with such a cycle can make the walker recurse until the stack overflows, causing a denial of service. Users are recommended to upgrade to version 2.3.3, which fixes this issue.

Affected (CNA)

Vendor / product	Versions
Apache Software Foundation / Apache XMLSchema	affected 0 before 2.3.3

CWE

No CWE identifiers supplied.

References

https://lists.apache.org/thread/1cj02tobjyhjqq723bvg78yxkqt1lk7k

ADP enrichment

CVE

No English description supplied.

http://www.openwall.com/lists/oss-security/2026/09/29/17

CISA-ADP

No English description supplied.

No references supplied.