CVE-2026-102497

EUVD-2026-88739
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 45.23%
Affected Products (NVD)
VendorProductVersion
apachexmlschema
𝑥
< 2.3.3
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://lists.apache.org/thread/1cj02tobjyhjqq723bvg78yxkqt1lk7k
http://www.openwall.com/lists/oss-security/2026/09/29/17