CVE-2026-102495
Apache XMLSchema: Denial of service through unbounded recursion when resolving schema imports and includes
Apache Software Foundation Apache XMLSchema
CVSS
7.5HighExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.53%Chance of exploitation activity in the next 30 days, higher than 43% of CVEs. Scored 23 Oct 2026FIRST EPSS
What fixes it
- 2.3.3Apache XMLSchemaCVE List
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
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.
Text from CVE List
Affected versions 1
- Apache XMLSchemaaffected: all versions before 2.3.3CVE List