CVE-2026-102496

UNKNOWN 0.0

Apache XMLSchema: Denial of service through deeply nested schema structures

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

Apache XmlSchema doesn't limit how deeply schema structures can be nested when it builds its schema model, 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.

Vendor	apache software foundation
Product	apache xmlschema
Published	Sep 29, 2026
Last Updated	Sep 29, 2026

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Affected Versions

Apache Software Foundation / Apache XMLSchema

0 < 2.3.3

References

NVD ↗ CVE.org ↗ EPSS Data ↗

lists.apache.org: https://lists.apache.org/thread/9z1vg8wmvwpfw748fb2nb55w4hgbnxol openwall.com: http://www.openwall.com/lists/oss-security/2026/09/29/16

Credits

This issue was found using Claude agents to study the security of open-source projects