CVE-2026-102497

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.

Score

CVSS 3.1 7.5 High

Status

Analyzed - security@apache.org

Published

2026-09-29

Last modified

2026-10-06

Weaknesses

CWE-674

Affected products

• Xmlschema (Apache)
• Apache Xmlschema (Apache Software Foundation)

References

• https://lists.apache.org/thread/1cj02tobjyhjqq723bvg78yxkqt1lk7k
• http://www.openwall.com/lists/oss-security/2026/09/29/17