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.

CVSS 3.1

7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.5% chance of exploitation in the next 30 days; higher than 44% of CVEs (scores of 2026-10-25)

CWE

CWE-674

Published

2026-09-29

Modified

2026-10-06

Record from

the NVD, synced 2026-10-19

Affected

• apache:xmlschema

References

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

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