What is CVE-2026-102497?

CVE-2026-102497 is a high-severity vulnerability in Apache Software Foundation Xmlschema, classified under Uncontrolled Recursion. CVSS score: 7.5/10. Published 2026-09-29.

How severe is CVE-2026-102497?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Apache Software Foundation Xmlschema

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.

Published 2026-09-29 · last modified 2026-09-29.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Apache Software Foundation Xmlschema

Weakness classification (CWE)

CWE-674 — Uncontrolled Recursion

References

lists.apache.org/thread/1cj02tobjyhjqq723bvg78yxkqt1lk7k (vendor-advisory)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2026-102497?: CVE-2026-102497 is a high-severity vulnerability in Apache Software Foundation Xmlschema, classified under Uncontrolled Recursion. CVSS score: 7.5/10. Published 2026-09-29.
How severe is CVE-2026-102497?: High severity. CVSS v3 base score is 7.5 out of 10.