CVE-2026-102495

Apache XMLSchema: Denial of service through unbounded recursion when resolving schema imports and includes

State: Published
Severity: 7.5 High
Published: Sep 29, 2026
Updated: Sep 29, 2026
Reserved: Sep 29, 2026

Description

Apache XmlSchema doesn't limit how deeply schema imports and includes can be nested, 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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

CWE-674 Uncontrolled Recursion

Affected Products

Product	Versions
Apache XMLSchemaApache Software Foundation	before 2.3.3Affected

References

https://lists.apache.org/thread/l339q3oldm0cd2lph4b6f93fd07x9g6svendor-advisory
http://www.openwall.com/lists/oss-security/2026/09/29/15

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